The point was on fitness, not preparedness.
Fitness wise I see no reason why he cant come off the bench.
Whether or not he is ready, well I agree thats up to Poch. It might be he is ready, he is a natural fit, and its all looking good. It might be he is no where near, who are we to say at this point?
Ill only say that when he signed I emphasised I believe he is a buy for next season more than this, but he is likely to get a super sub role fort he remainder of this.
He will want to play, with the WC coming up, so the motivation should be with him.
Ultimately though, he needs to get involved at some point, and a direct attacking threat late in the game could well be just what we need against Arsenal.