I'd be happy if he had a role for us similar to what Solskjaer had for Utd. I think he's a top player but can often lose confidence or frustrate us, but if he's not the main man and a 'back up' striker in a sense, perhaps playing some matches against bottom half teams (and spurs) who he seems to tear apart, he could do a good job for us over the next few years.
Players like him, Milner, Zabaleta and possibly Kolo who don't play every match but are happy to do as they're told without making much fuss are important for us.