I'll be very surprised if they do. The whole thing was so obviously a "contract romance", as someone else brilliantly described it. They no longer have a reason to need the PR now the Twilight film franchise appears done with. The whole thing has just so clearly been for the benefit of Summit and little else.
I don't think it was a contract romance, they were seen out way too many times outside twilight for it to have been but I do think the magic probably went out of their relationship when she cheated. I always thought he was into her more than the other way round and I don't think he felt the same after July judging by the pictures of them.