When that happens, there's the possibility that may be farewell to D&D, or at least in its official capacity. I'm working on shifting my games over to Saga Edition, while jamesbarrett is talking about possibly running Slayers d20 for a while. sirfox talked at one point about shifting his "furry D&D" over to 4E, but that was before the game actually came out and hasn't come up since. Given the generally "anti-4E" trend of the group, I don't know if it's likely to happen. I imagine we'd all be willing to at least give it a try.
I also need to think about what I'd like to do in the future, once RHoD is out of the way. We have a SWSE game stuck in mid-scenario that needs to at least have the one adventure finished if nothing else, and I intend to run Uncanny Midnight Tales as well. But I can't imagine it'll be that long before I want to get back into a regular or semi-regular fantasy game and I have to think about what I want to run. S&S Saga? A Saga-ified D&D? Something else entirely? Not sure.
 Not my first choice of a game, but given how seldom I'm a player, I'll take what I can get. I have three as-yet-unplayed "standard D&D" characters queuing up since I've gotten to play Celedras and Arshan some, none of whom are compatible with Jamie's proposed Slayers game. I'm sure I'll come up with a playable concept for that too.