It has to be a licensing restriction. We know continuity is separated by brand and by extension license, and given those masks are named after the characters that used them it only makes sense they'd get a name change. We know the Thomas brothers have access to the AVP stuff, but it seems based on Hunting Grounds that they have access to the iconography, just not the characters. That might even be an indicator of what Disney ultimately owns provided the lawsuit goes south.
Falconer is a weird one but I speculate that's over Isabelle.
Mr.Black is a name used by Berserker, and with the game having it's own Berserker it only makes sense to rename it to avoid confusion. In the case of Isabelle I suspect that because of Isabelle having the mask on her back someone made them change the name as to suggest a different Falconer. I wouldn't know specifically why, but that would explain the name change and default color being bronze.
I really doubt the supers are a separate license. That'd be a bit weird and while I could ask OKH I doubt he'd know. Like why would the supers be a separate license but not the characters like Isabelle and Royce? Maybe there is some weird legal crap like with the AVP stuff. Though I chalk it up to the issues with the head as to why they didn't do the characters and did the helmets instead.