I don't see any chance for that. It would need a lot of work, redoing the quests, monster population, balancing.
Not really, you can completely solo both as it is. Well you can for TOR I know 100%, and I hear the same for Secret World.
I don't like the idea of such story focused games dying forever. Other MMOs have been brought back like Earth and Beyond. Star Wars especially would have the fanbase for it. It's possible.