I'm starting to think we won't see heroes for every sphere. Right now some heroes have two versions and it would be really cool if for example Aragorn was in each sphere because if he was your favorite character you could now always use him and have the flexibility to build any deck. Now that FFG has announced we'll only get one actual hero in The Road Darkens (besides Frodo) I don't think they will continue the trend of four heroes per Saga. I'm still super sad about this but here's one potential reason... In the Campaign mode for these Saga's there are penalties for switching your heroes out but not for switching a version of a hero. So if you had four versions of each hero you can swap them out and deck built to a certain sphere with no penalty. And another big reason we may not get heroes in multiple spheres is that some characters really only fit well into one or two spheres such as Boromir who's two versions seem perfect already.
What do you all think, will we get more versions of certain heroes and do you want more versions??