Well, I can't provide all the information that you are looking for right this second, but I do have some news.
In one of my Mags at home (I believe Top Deck) they have an article titled "The Future of Magic". Basically it goes over some of the details of the next 2 years worth of Magic Expansions.
It doesn't give you a boat load of info, but they do tell you who the main set designers were, and I think Richard Garfield is working on 3 sets, Buehler 4 or 5.
WOTC is very excited about how the sets are headed, and I was excited after reading the article. However, you also have to keep in mind that they are just promoting their own product so its very subjective. Just think about the big deal Pepsi made when they were coming out with Crystal Pepsi. Yeah, that went over well.
As soon as I find the article, I'll repost better info.
What happens after the Invasion I have no idea, and card details are sketchy. MTGNews had an article and had several card names from Dan Frazier:
Additionally, two supposed Legends from the first set are Gerrard and Tahngarth, while it is rumored but unconfirmed that they will finally make a Yawgmoth card (that I'm not quite believing until I see it).