The idea has plenty of merit, although personally, I don't see the need for a faction, but having the idea spread across nearly all of the existing factions. I can see robots being used by DSE, hated by Xenos and the like for making human workers obsolete, used on mining bases et cetera.
Possible sources of inspiration can include the following:
Blade Runner/Do Androids Dream of Electric Sheep. Good for making the difference between humans and AI questionable.
Star Wars, particularly the droid characters, some of which are more human than humans. See: Darth Vader, more machine than man, and R2-D2 and C-3PO, having human qualities.
Data from Star Trek: TNG. Everything he ever says or does can be applied to more advanced AIs.
The Matrix, particularly the cartoon extra 'The Second Renaissance' from the Animatrix. This highlights machines being oppressed.