Can't see Chelsea being the best move for Oscar.
I know it's been said that even though it looks like they have a lot of attacking midfielders, they will have to get rid of a few, but it still seems like he would be going there, just as a squad player and an option, and may not get to fulfill his potential. Thing is, that could also be the case with us here, although if we move on players he would be more likely to be a starter.
They have Mata, Marin, Hazard. If we count Mereiles and Lampard as holders in a 4-2-3-1, they still have Sturridge and De Bruyne. Sturridge will certainly be moved on, so that could bode well for us if AVB wants him, but it seems like De Bruyne would be much more suited to being a back-up/squad option than Oscar, who is a Brazillian international and would hardly want to start playing less games. This is without including Ramires, who played much better as an attacking midfielder rather than one of the holders last season.
So even though I believe that Chelsea are in for him, I don't think it's a certainty that Oscar will go there. But then again unless we move players on I'm not sure where he fits in with us. I'd imagine it would mean Modric would definitely be sold to create space, but if we then bring in Moutinho I still don't see where Oscar fits. Unless it's as a wing-forward. But is there where he's best? And does that mean Lennon is going to be deemed not good enough...
Basically I really wouldn't be surprised if Oscar simply stayed in Brazil. The move only makes sense if there is a clear path for him to play the majority of games.