First, this is just speculation. I'm in the "fiction" category of this rumor. I first saw 4e threads in 2002 and I've seen them every year thereafter. Eventually the rumormongers will be right, but it'll be a long time for that.
Second, I'm betting this thread makes it out to seven pages.
Third .... I may as well have a little fun here so:
1) I'd like to see a simplified version of D&D that is able to run on top of the "advanced" ruleset. So you'd have a game without rangers, paladins, bards, druids, wizards, gnomes, half-orcs, halflings, half-elves, most of the monsters, 50% of the spells, feats, and skills, and a LOT fewer combat options. There will be four or five templates given from 1-20 that dictate how the character levels up so newbies won't be overwhelmed with decisions. What sort of idiots (aside from ourselves) buy games with 800 pages of basic rules?
2) For the "advanced" rules I'd like to see most of the class abilities go. Instead, every couple of levels you could pick from a list of class abilities. So no 4th level ranger would be exctly alike.
3) Drop the frigging Greyhawk references. Clerics choose two domains. Period. No silly little diety list.
4) All game developers must read a basic economics textbook. This stuff isn't hard, really. And then I wouldn't have to perform the crazy mental gymnastics around this stuff (c.f. Ebrron rail costs or paying 100gp for a 1st level spell). I reccomend New Ideas from Dead Economists.
5) The rock-paper-scissors model of the classes breaks down at high levels. Either a) bring back the old experience point curve instead of the linear progression we have now. b) add class features available at level 15 to bolster the weaknesses of the given classes.
6) either get serious about minis or move them to their own seperate game. Right now the game is in mini limbo. I would personally suggest a seperate mini game that had a "heroes" expansion pack so that peopel who didn't play the mini game could at least find a selection of pre-painted D&D figurines.
... just my two cents .... not that WotC is begging me for ideas or anything ...