Dire Bare
Legend
In general I agree. But let me throw out one more possibility that I think isn't getting much consideration among the speculators:
Assume for a moment that the plan is not to come out with a new edition, but it's instead to revive all old editions, and support them all.
Nah. I can see WotC republishing all old material in electronic form again, and I can even see them developing a set of web tools that support all editions. But I cannot see them producing NEW content for anything but the current edition. It would be a waste of their time and money, and they know it. Now, encouraging fans on their forums to contribute new fan material to some sort of ratable database, I could see that . . .