I'm so excited right now. I'm just gonna jump right on the hype train immediately. I don't know any of the new actors (aside from Serkis and von Sydow, of course), but that's okay with me. At least I don't have any negative connotations with them.
I feel like the absence of Billy Dee, Lawson, Bulloch and other people doesn't exactly mean they won't show up at some point down the line. In fact, I'd say that the first film needs as few extraneous cameos as possible in order to build up the new characters as legit to a jaded and cynical audience.
I'm really, really jazzed.