I was surfing around some daily sites that I check and my twitter timeline and came across a tweet a few minutes ago where Emmanuel Sanders was on ESPN 970 and said he was told he'll return kicks and punts next season.
Dale Lolley @dlolleyor - Emmanuel Sanders said on ESPN 970 that he has been told he will return kicks and punts in 2012 for #steelers
This tells me that Antonio Brown is going to continue his bigger role in the offense and the Steelers want to get Sanders more involved in the return game to help ease the pressure on Brown. Either that or they just want to have a backup ready to go. I would think though they'd rather use Sanders if they can because of the pounding returners take. I'd hate to lose that explosiveness that Brown gave last year so maybe they still use him in key situations?