I can't see Chelsea or Man U losing to Inter or Schalke
Schalke simply aren't good enough and Inter are not the team they were last year - think there's undue optimism on here that one of them won't be in the final as it looks pretty nailed on
Thing about Inter is that they're improving steadily under Leonardo. Defensively they have looked weaker this season, as almost all of the back 5 have suffered a loss of form, and Samuel is injured, but that said, they are getting better.
Milito has suffered a huge dip, and has been a complete non-entity this season, but to counter that, Eto'o is probably THE form striker in European football at the moment.
Bayern are a very good side with an average defence. But Inter managed to knock out a side with Piggy, Muller, Gustavo, Robben, Ribery, Gomez + Lahm. They'll be no pushovers.