Giantfreakinrobot is now repeating the Harrison Ford/Episode VII report so unless the entire thing is a masterful red herring of some sort to give a PR boost to Ford's currently moribund career or things change in the future and he eventually backs out I guess I'll just stick to the assumption that Han Solo will be in at least one of the next three episodes.
Since Harrison under most conceivable scenarios would be the most difficult of the OT actors to get to agree to return, that opens the door for everybody else to jump in so long as their health allows them. Mark, Carrie, Peter, Anthony and Kenny, Billy Dee....even Denis Lawson (Wedge) would be fun to see again as an aging Rebel Alliance veteran with some sort of honored status in the New Republic.
"Of course we should listen to Antilles....he knows what he's talking about. He survived both
Death Stars, you know!"