Yeah, if I ever get drawn into multiples, it'll probably be a focus on Luke. I like the evolution of a character's look throughout a film or series of films. Like Terminator for instance, I've bought every HT Arnold since the first one and I like the stages the figures have gone through. That ended though, no way am I getting Genisys Pops.
I never bought HT Bespin Luke even though that's my favorite version of him so who knows. For years I meant to buy a Captain America and just never got around to it because of how many different versions popped up. I can definitely envision one of my detolfs having a Hot Toys Farmboy Luke, Bespin 2.0 Luke (Dagobah if those rumors are true), and Jedi Luke (again, if Hot Toys is indeed doing him) representing each film though.
I sold off most of my bespin Luke parts. Something bout the face that doesn't quite do it for me. But yeah, ESB is my favorite out of the trilogy and Bespin look is my favorite out of all version. I think my line up would be Farmboy, Stormtrooper, x-wing, bespin, Jedi. I could make do with or without hoth ver.
They'll prolly reuse the current Solo head for the Stormtrooper. If they could reuse a 2008 Joker head on their 2014 release, I don't see why they'd bother sculpting a new one for the stormtrooper version. Seems like they'll release solo for next year's instead.
Get the GA Cap. I think that's a figure that's good enough to represent him; he's got the first movie costume look, but also from the what is arguably the best comic book / marvel movie - the winter soldier. But make sure you get a Rogers head from the current avengers cap. The head that comes with the GA is hideous.