Considering that they JUST handed off the assignment for writing Episode 7, I really doubt this will happen. Concerns about Luke, Han, and Leia have already been voiced. If they bring back Vader, they'll have to bring back those three. If they bring back those three, they'll have to find younger actors who will actually fit (and will actually want to play) the roles.
Different actors and a resurrected villain whose second-most classic moment in cinema is his redemption does not make a sequel. That's called a remake, which I am in favor of as long as the general plot progression and awesomeness of the action sequences are preserved.
Different actors and a resurrected villain whose second-most classic moment in cinema is his redemption does not make a sequel. That's called a remake, which I am in favor of as long as the general plot progression and awesomeness of the action sequences are preserved.