With that whole lawsuit, guys like Shelley and The Amazing Red, couldn't sign with WWE. WWE has shown interest in both, but who knows what will happen. As for Sabin, I'm a huge fan, but he is becoming TNA's version of Rey Mysterio. He will stick around, only because he's banging Velvet Sky (who happens to be back).
However, I just don't see a MCMG reunion happening anytime soon. If Sabin heals up in time, maybe he comes back with Aces & Eights. He'd be a bigger name than anyone else currently involved.