I know it's a big "if", but if Hummel is anywhere near 100% next season the Boilers will still be pretty good.
No question, if the Gophers return all their guys they'll be loaded with experience next season and will have what amounts to at least a 4-man recruiting class (Oto, Eliason, Hollins & Coleman) + a 5th guy (Mo) who basically will be new. Certainly 2011-12 should offer an opportunity for the Gophers to avoid the 8-10 to 9-9 doldrums they've remained stuck in. A lot of Big Ten teams will lose significant players, the Gophers less so. But we'll need to find a couple guys that can put the ball in the basket on a night-in, night-out basis.
The best teams in the Big Ten next year? Ohio State (no matter what the Bucks lose they'll still have a ton of talent) and Illinois (perhaps losing their seniors will be addition by subtraction?). After that talent-wise I see a lot of similar teams with the exception of Penn State, which likely will suck after losing Battle & 3 other key seniors.
Bottom line? I think the Big Ten takes a step back next season, meaning opportunity for the Gophers to move up the conference pecking order.