Stables seem to be primarily used to get over the midcard and tag team talent whilst pushing the leader into a secure main event slot.
Thusly, I don't think we really have too many choices for a big stable. Too many wrestlers that are going to be pushed to the main event soon don't have the character personality that would warrant having a group of close friends. Guys like MVP, Cena, Orton, Kennedy...would they really have a successful stable? I doubt it.
Because of that, and how we've seen Corporation 100x over, I think instead of having a giant stable, we could have some mini-stables that help get over some talent but not by overshadowing the rest of the rosters.
For instance, once La Familia is over with, we'll have Edge + Ryder + Hawkins. Edge is already a main event talent and once they stop booking Ryder/Hawkins to look like jobbers, they could be a solid tag team much along the lines of Edge/Christian. I once heard the term "Rated R-my" which I really liked, but "Rated R-Entourage" is still ok.
Other possibilities:
Morrison (Main Event) + The Miz + Kenny Dykstra, and maybe someone for muscle. You could tag team two of the 3 outside of Morrison and use the other one for a midcard title chase. To keep with the whole "there are winners and there are losers", the "palace of wisdom", all that such, just call them The In Crowd and continue that gimmick.
Regal + Burchill + Katie Lea. Regal for main event, Burchill for midcard, Katie for the women's title obviously.
D.H. Smith + T.J. Wilson + Natalya Neidhart Again, not much of a stable per say, but if they brought Wilson up, he and Smith could be a solid tag team and Natalya could go for the women's title. Naturally, if Teddy Hart wasn't such an idiot, this could reform the Hart Foundation, but that probably won't be happening.
Hell, if you really wanted to start making some stables to get over the tag team division whilst keeping the stars as jobbers and such, why not have an ECW stable? Tommy Dreamer, Stevie Richards, Nunzio, uh...I don't know, who cares? Lol.
Anyway, my point is, I don't think having a giant stable running the WWE is the right thing to do right now as most of the guys that we/they want in the main event are already on their own receiving those pushes. Just for fun, though, they should have some mini-stables and tag teams to help bring some unity.