I think it would depend on the injury situation or Heitinga moving on. I couldn't see Moyes bringing in a fifth centreback to compete with Jagielka, Distin, Johnny and Duffy. And how would the proposed move for Forren work?
I'd take him back though. We would potentially have three of England's four defenders for one thing. He had a great understanding with Jags and even kept Spain at bay alongside him. His goals would be really useful. And he could cover for Baines.
You can't begrudge him wanting to further his career, win medals, play in the Champions League, play alongside worldclass teammates and earn a lot more money. The Rooney case wasn't much different and I'm sure we'd pretty much all take him back. Moyes should never have played Lescott in the Arsenal game as his head wasn't right. He's a professional and he wanted to prove that he was worth a move, so he wouldn't have played badly on purpose.