With Brett Favre now back with the Minnesota Vikings, USA TODAY's Sean Leahy examines 10 questions about how his 20th NFL season will play out:  1. Can Favre stay healthy?Even Favre, who will be 41 in October, admitted on Wednesday that he can't predict if he can withstand a 16-game season. The pain in his left ankle remains, as do lingering bone spurs. "I can't promise you if I'll make it through the season," he said. "I couldn't tell you that if I was 21." He has had surgery (on his arm and ankle) in consecutive offseasons, so the possibility for injuries is there. But Favre, who has started 285 straight games dating back to 1992, is as resilient a player as there has ever been in the NFL. A good guess says he'll make all 16 starts, but the specter of his career ending with him riding off on a cart looms.  2. Will there be harmony in Vikings locker room? The era of good feelings didn't even last a day for the Vikings before a negative story emerged. Yahoo! talked to an unnamed Vikings player who claimed that Favre thought head coach Brad Childress had "no clue" about offense and "just doesn't trust him." Childress and Favre clashed late last season when the coach wanted to pull the quarterback from a loss at Carolina. And, when talking about Favre's desire to jump right into game action on Sunday, Childress said Wednesday that "we've got to protect them from themselves sometimes." So the possibility for friction is there, but it's unlikely to be enough to ruin a season. Childress heavily recruited Favre through the offseason (remember their armadillo hunting trip?), and likely knows the veteran QB is the ingredient that can potentially take the Vikings from good to great this season.  3. Will other teams be targeting Favre?Yes. Have no doubt that Vikings opponents are anxious for their opportunity to lay into Favre. Redskins defender Brian Orakpo, a second-year player, said on Wednesday he wants a chance to hit a player who's likely headed for the Hall of Fame. And Saints defensive coordinator Gregg Williams (whose team battered Favre in the NFC title game last year) told USA TODAY this month that his team would send a message to Favre in the opener with its physicality. Childress said he knows Favre will "get knocked on his keyster," but said he wants other teams to stick within the spirit of the rules. Favre, who has never shirked hits from opponents, is prepared to be a target and his return should be seen as a sign of his confidence that he can withstand the barrage.  4. Which Vikings players benefit most from Favre's return?Visanthe Shiancoe must have been overjoyed to see the tight end-loving Favre walk back into the locker room. Shiancoe caught a career-high 56 passes and 11 TDs last season with Favre, a union that will likely enjoy strong ties again. Same with Sidney Rice, who blossomed into a big-play Pro Bowler last year with 83 catches for 1,312 yards. Former rushing champ Adrian Peterson will probably see fewer carries with Favre under center than if Tarvaris Jackson had been the starter, but he's still yet to rush for fewer than 1,300 yards and could see more than the 314 carries he had last year if the team wants to save Favre with fewer passes than last season.  TOP 10: Best moments of Favre's careerTIMELINE: Favre's decisions in 2010PHOTOS: Brett Favre in pictures  5. Besides the Vikings, who benefits most from Favre's return?Without a doubt, it's the TV networks. There's no secret why the NFL chose the Vikings to open the season against the defending champion Saints. It's to showcase Brett Favre going back to the bayou. The Vikings currently have four games scheduled in primetime windows on NBC and ESPN -- a number that could rise late in the season -- with two others scheduled in the 4:15 national window on Sunday afternoon (another number that could rise). Throw in the many hours of coverage ESPN, NFL Network and others will devote to covering Favre, and his return is a bonanza for programmers.  6. Is Favre good for the NFL? Critics will say they're tired of hearing about Brett Favre. They say: Come back; don't come back; we just don't want to see it on TV and read about it in USA TODAY every day. And Favre, who acknowledged Wednesday that "no one is deserving of all he attention" he receives, seems to agree. But there's no doubt that the enormous attention given to Favre is good for the NFL. The speculation on his future has become as much of a year-round event as the league's never-ending calendar. And the commissioner is pleased. NFL boss Roger Goodell said earlier this month that Favre is "great for our game."  7. Are the Vikings still the best team in the NFC North?It's a tough call, as they may vie with the Green Bay Packers for division supremacy all year. Favre's replacement in Green Bay, Aaron Rodgers, could be on the verge of becoming the league's next great signal caller. He has playmakers in Greg Jennings, Donald Driver and Jermichael Finley, an improved offensive line and the reigning defensive player of the year, Charles Woodson, on the opposite side of the ball. And the Packers have the revenge factor in mind, after having been beaten by Favre in the teams' two meetings last year. Green Bay finished just one game behind the Vikings' 12-4 mark last year. It's likely to be another neck-and-neck race this year.  8. Can they win the Super Bowl?Yes. They have the talent with Favre heading up an offense around Peterson, Rice and Percy Harvin and a stout defense anchored by a line that's as strong as any in the NFL. Will they win the Super Bowl? Impossible to say now. Injuries, bad decisions (such as Favre's INT in the NFC title game) or bad luck (such as the coin toss the Saints won in overtime of the same game) could derail them. But they enter the season as one of the teams to beat, a factor that Favre acknowledged made it easier for him to come back. "I think had we gone 8-8 (in 2009)," Favre said, "then (not coming back) would have been a no-brainer."  9. Are there any milestones left for Brett Favre to break?Not a lot. Favre is the career leader in virtually every major passing category: Passes, attempts, touchdowns, starts by a quarterback, wins by a quarterback and interceptions. As Favre said on Wednesday, he holds all the good records and all the bad records (except for career sacks, where he trails John Elway by 13). But Favre held the record for most MVP awards until Peyton Manning passed him with a fourth last season. So Favre could aim to tie Manning's mark there this year. And one honor that has eluded Favre his entire career: Super Bowl MVP. The year he won the title with the Packers, Desmond Howard was the man of the match.  10. Will all this happen again next year?Don't rule it out. Favre playfully said on Wednesday that this is his final year. But he qualified that with a smile and by saying that even his family wouldn't believe him. A Super Bowl title might increase the likelihood that Favre would leave the game at its pinnacle, but it wouldn't guarantee it. Favre's contract (as well as the NFL's CBA) is set to expire after this season, so he could potentially become a free agent next year. But we'll save that speculation for Favre Watch 2011.
10 questions about how Brett Favre will fare with Minnesota Vikings in 2010 - The Huddle: Football News from the NFL - USATODAY.com