Missing great film sagas that are not adaptations, sequels or reboots?

I think I'm not alone in this: audiences are setting the bar too low these days: if I catch a couple of good sequences in an Action/Adventure/Sci-Fi movie, chances are I'll be telling people I've enjoyed it. It didn't use to be like this in the 80s/early 90s. Consider this: in the last two decades, how many big budget movies can you point out that weren't a book/comic/game adaptation, a sequel/prequel, a reboot and/or had a somewhat familiar plot?
Even if you can name a few, do you feel these are the "exception" or the "rule"?
It's not like I don't love them (the good ones, that is) but it's like a fellow movie fan eloquently wrote - right here - on an Amazon review: "if somebody wants to make a new movie these days, Creativity means going to the nearest Blockbuster fishing for ideas..."
I would like to invite you to check out a Concept presentation for a fresh Movie Trilogy - that got excellent feedback from medium-level industry professionals - even the former Director from a popular TV Series offered to direct it - but never got within "radar range" of Hollywood's blockbuster stakeholders.
Look for it on everybody's favourite video spot under bdmaboutpower.

The Matrix springs to mind, as does the Holy Trinity of Christopher Nolan films (Inception, The Prestige, Memento). The non-sequel Pixar films always have a fresh feel to them, and achieve the notable distinction of actually getting better with each one (Up > Wall-E > Ratatouille). But yeah, these are definitely the exception rather than the rule

Steven,
Would it be too much to ask you to check the presentation I mentioned on my post? I could use some feedback. Tell me what you think.
Thanks,
JC.

Can't do it during work hours I'm afraid, but will definitely have a look over the weekend

Thanks, Steven.