Why? He was saying recently he'd consider a Championship post.
To be fair, I thought he was joking / being gently patronising with that West Ham comment.
I doubt he'd come, but if you don't ask, you don't get.
Oddly, part of me thinks that Ancelotti would maybe act like we owed him something for coming (I have no idea what kind of person he is, so that might be unkind) and would be liable to get big job offers elsewhere all the time, whereas Benitez is looking like he has something to prove.
Read Ancelotti's autobiography recently. The bloke basically takes the piss out of himself on every page and generally seems like the least arrogant football manager on the planet. Ray Wilkins also says he's an adorable chap, and he's rarely wrong.