i dont underestimate arsenal at all. i think reyes and v persie are fast movement and quality players, you might miss ljunberg.
the key to win against arsenal imo is actually to ATTACK, because imo arsenal defens is not that good to stop players like trez if we would play so, but cap will still stick with 4-4-2 and wenger might even get a win with his differant strategy. i would want to play with mutu behind the strikers
something like this
------ibra--trez----
--------mutu-----
-vieira--emo--camo
because i do think that we can stop you in the middle, mutu giving a lot of headache and camo vieira supporting from the wings, leaving emo a bit more back for defensive dutys. I dont have fate on ibra, but i really hope he plays well, that means no selfish moves and if there is a good opportunity he would make the right desicion to get that goal.
but i also think if arsenal scores somewhere in the start of first half, we really might be in trouble because usually our players loose their heads, game play is totally ruined.