On an outside chance, I could see Pierce going to the Lakers (but as the years go by, the less I think so). And although it would hurt me a ton, I would kinda understand it considering he grew up a Lakers fan, so for all he's done to this city, I might just allow him to be selfish for a bit.
But I really don't see him doing it, not after winning a championship, the grind of the past few years, and losing to the Lakers in the Finals, I just don't see it.