I haven't read all posts, this thread, but I'm not worried about any of it. To my perceptions, WotC is the company that saved D&D. Whatever form it has taken and will take in future editions is irrelevant, because if I start making blanket statements about what I will and won't do in the future, then I will have taken HUGE steps back in my life--who wants to be in HIGH SCHOOL again, for cryin' out unprintably? Aside from that, Wizards of the Coast has every right to do whatever they choose with their stuff.
That said, if WotC puts walls around D&D again, hopefully the game will be inside just one wall, not several divisions within a company, and they won't stop releasing new content just to be spiteful to previous owners, like some people did previously.
I have no objections to a company trying to protect its interests through consolidation, because I think that the money-minded people in that company know where their interests lie: if there are no new products, there will be no consumers, and no new money on a proven seller. The game-minded people in the company have the same goals as the money-minded ones, if for different reasons.
I will definitely be sad if D&D goes away, if for no other reason--and there are plenty of other reasons--than simple nostalgia. I don't really believe it will, though, as I stated above.
I say, "Rest easy and let it happen. There's precious little to be done about it anyway, and no profit is gained through worry."