I think that anything "extra" will be added only if they really want to. It's not like we're paying them for recreating this game, for free I might add, so for now we should just expect all the routes to be slightly changed to fit the new age of some of the characters and the removal of any weird-ass ending the original had, and of course, the routes we never received. But who knows, maybe they'll do it, eventually. Just don't expect more than what they are giving us.