Holtby would more or less be coming in as a direct Rosicky replacement for me. We were linked with him again last week and that made me happy. It seems to be between us and Liverpool in the British media and simply us in the German. To be able to rest Cazorla would be a huge bonus for us and to have an alternative would strengthen the squad by 25% alone.
While I imagine a huge amount are considering he could play on the wings and he can. With Ryo, Gervinho, Chamberlain, Walcott and probably someone coming up from the youth, I doubt we'll need him there.
The only thing that could get in the way of Holtby coming would probably be Diaby.