See, I would be more inclined to buy it even more if I didn't know what was added/removed from Madden 2010.
The bare "casual" fan does not care what Madden 2011 has, all they care is that the rosters (if that) are right and the game is Madden 2011. It's that "Madden" name that we all know that a football game is being talked about - that's why you get your casual fan buying it.
Now for the hardcore guys...well, I say market away - but at the same time I want to be surprised. I want the threads after 3 months of 2011's release to start with : "HOly Crap - anyone seen this yet!?".