Yep! First thing I did upon reading the title was Google it! Fuck me, haha.
I'm a huge fan of both bands, and would love to see LTE collaborating again. But I've read several interviews with Mike Portnoy since the split, and according to him the Dream Theater guys have shut the doors on him. Not to mention, Portnoy has been publicly taking shots here and there at DT regarding their new material. I just think there's some bad blood between those guys now. So if there's any possibility of a reunion, I'd say it's a ways off. But, who knows, it could be a very different situation than what I've gathered...