I think House of X and Powers of X is laying the foundation for the next year or two of X-books. It may even be flashes of what's going to happen over the next year or two of stories. So the people in the portrait may simply be the characters who are going to have significant impact to what has been, what is, and what will be. Two 6 issue miniseries over 6 weeks seems like a lot, but there are a lot of characters to cover, and I think they are going to cover time periods from X-Men history, so I think the story is going to be spread out over years. I'll give a simple example, Firestar is one of the characters and she hasn't gotten a lot of emphasis in the X-comics prior to this, but Absolute Carnage is coming up right after HoX and PoX, and Firestar was a big part of Maximum Carnage, so I think if HoX/PoX is a layout of the history of the x-franchise and hints about the future, they may be hinting at Firestar's upcoming appearance in Absolute Carnage. They may lay hints down about the future and past of a lot of the characters in the picture to give a hint of where things are going to go with the relaunch in September.