Thing is, I usually see far too overt an influence in most chapters, including my own, from their inspiration. I mean, it's not easy as Astartes are not exactly the subtlest of angry-post-human-cyber-augmented-warriors that ever existed in any sci-fi setting.
With the glass helms, it doesn't need to scream Mysterio, so long as you 'space marine' up their appearance. like the above image have a skull spray-painted on the front. Throw Mysterio through a grimdark filter and see what pops out visually.
Your IA was fun, not referential and I honestly didn't place the colour scheme until you told me. Maybe I'm just an idiot.
All I'm saying is you have some wiggle room, is all.
Perhaps have your Librarians with glass helms? It'd fit the influence!