I see where you're coming from. This trilogy is definitely informed by elements of the EU, but the way I see it that's similar to what superhero movies do.
For instance, with Christopher Nolan's Batman trilogy (not that I am trying to compare myself to him) everybody in the real world knows who Batman is...right? But, regardless of whether or not you liked the movies themselves (my opinion of his work is...complicated), I think it's safe to conclude from their favorable critical reception and box office success that you can re-tell a story that everybody thinks they already know, you just have to do it intelligently.
Each one of the three Nolan Batman movies cherry-picks elements of the comic book canon at its leisure. Nolan could have started the trilogy off with Batman facing the Joker, but he chose to delay the appearance of the clown nemesis until movie #2. Likewise, he wove together a storyline from numerous disparate elements in developing the third film. I am not well-versed in Batman comic lore, but it is my understanding that Bane, Catwoman, and Robin are not associated with each other in the comics like they are in The Dark Knight Rises.
As for the whole Redblade thing, yes I know it's kind of cheesy. But this is Star Wars. A sprinkling of tongue-in-cheek elements is acceptable, yes?
I'll post more of the outline as it becomes available. I feel like I start too many of these outline threads and then forget about them after a few weeks. :P
I think I'll update Alien III next.