You know, it's not such a bad idea, that Lando is not in Episode VII. Remember, he was not in Episode IV, but appeared in later episodes. And played nicely. I also believe, that it's not good to bring all the characters at once. This was not the case with Indiana Jones, where I missed Sallah, but I think, that as a new trilogy is coming up, so there is plenty of space for him to come back. The more sad news was a year ago, when Denis Lawson said, he wouldn't like to return as Wedge Antilles. This is not the first case, when an actor says a thing like that, but they change their mind with the release of a film and prepare themselves to be in the story again. Caroline Blakiston also longed for returning as Mon Mothma in new episodes. She hoped to play Mothma's grandmother in Episodes II or III, but never received a response. Sh could have played Mon Mothma in Episode VII, but her character is most likely not to appear at all in this story. We can be sure, that Lando's pal Nien Numb is most likely to re-appear in Episode VII, as it was stated prior in the rumours.