Apparently (and somewhat surprisingly), rumor is Ford is up for reprising his role, at least at this point:http://insidemovies.ew.com/2012/11/05/star-wars-sequel-harrison-ford-han-solo-exclusive/
Honestly, and I know everyone has their own opinions on this, but I sort of want to see the OT characters back. I know they are older, but really that is where the magic is for me with Star Wars. I enjoyed the prequels for what they were, and still watch them now and again, but they never held that same magic as the OT did for me. A lot of that may be nostalgia and everything, but the prequels for the most part never had that same feel to me as the OT.
I think it would be nice to at least have them appear, whether it is to set up new characters for future installments, or in maybe more supporting roles, but I just think it would be nice to see again. Luke, Leia, Han, Chewie, the Droids and even characters like Lando helping to continue the Rebellion, etc. I'd be interested in seeing any new movie set in the SW universe, but honestly the OT time period is the most interesting to me right now.
I've never played the game(s), although they look spiffy, but that might be where the Old Republic type stuff (or even other EU sources) don't seem as "Star Wars" to me. I enjoy them for what they are, and maybe would really get into them if I devoted more time to those areas, but I sort of like having the character follow through from the movies. That is sort of my feeling with EU books/novels (which, to be honest, I haven't read a ton of)....it stinks for those who are way into those, but to me they had some great stories and they'll still be great stories even if the movies overwrite them in some ways. I'd rather have original ideas where I don't know what's going to happen than an adaptation of a story I've already read. One drawback mentioned of the prequels was knowing the "end point", and one of the most exciting things we have about these new movies is that anything could happen this time around. There is great material in parts of the EU, and some stuff that could even be incorporated, but to me the movies (and to a lesser extent the TV series) supercede anything else, canon-wise.
That being said, one adaptation that would be cool to see would be the Thrawn Trilogy. That is one EU source that I've read several times, and I really enjoyed it. Even if they went the direct to video animated route, it would be cool to see that story told at some point. Anyways, back to the Episode VII excitement. To me, this is some of the best part of having new movies, having all this discussion and speculation on the forums. Just wait until we start getting casting/director news, story rumors, and even set pics. Fun stuff.