The positive way of looking at this is - If Dembele stays, cool. He's starting to become a useful player and maybe he can finally string together a run of games next season without getting injured.
If he leaves, well we've potentially dodged a bullet - we have no idea how many games he will actually play; it wasn't too long back that we were literally begging for us to get rid of this guy since he's perpetually on the hospital bed. There's a very likely chance that happens again - it has what has been proven with him so far; him staying fit is the anomaly not the other way around. Also, not to mention we don't know if his form and attitude will go back to what it was once he has a nice long and fat contract signed.
So I'm pretty calm about this, and would be totally okay with however this plays out. The only thing I don't want is Dembele staying and us paying him a crazy wage (which is unlikely to happen under the circumstances anyway).