The signs are that Vermaelen will play against Chelsea.

Originally Posted by
Arseblog
Speaking after the game,
he [Vermaelen] said:
Personally I don’t believe in that. If I have an injury for a long time I don’t believe in coming back and getting rhythm. I think it’s just in your head, it’s just a mental thing. If you’re a footballer player, if you’re a pro, you have be there straight away, and that’s why I wanted to play today.
I know it’s early days, and there’s been no indication of this from the manager, but I think he’ll play Vermaelen in the centre with Mertesacker and move Koscielny out to right back for this one. When you’re facing a team as good as Chelsea, you need your best players out there and Vermaelen is one of our best players. More on this tomorrow but I think Koscielny, for all his effectiveness in the middle, will provide us with more solidity and pace at right back than Djourou.
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Sounds like a recipe for disaster playing Kos at RB. He doesn't have pace and isn't much going forward.
Kos and Mertesacker have been good in recent games. Vermaelen at RB sounds like the better choice?
Also, Rosicky or Ramsey for the 3rd CM position? Both have shown decent form, but I'd put money on Rosicky being the more likely to stick a foot in and annoy their midfield.
The rest of the team picks itself, I guess.