Paladin as Visions' Dark Mirror
It's traditional for a hero to face a "dark mirror" version of themselves as their first Villian. Vision has already done this a few times since he was the "light mirror" version of Ultron in AoU and was his own Dark Mirror in Wandavision.
I assumed Ultron would fill this role again in Visionquest (and he probably still will) but I wonder if Paladin might also fill this role to some degree. Paladin is not THE Paladin he's A Paladin. His name carries a legacy forged by his predecessors, much like the way "not Vision" feels about Vision. Paladin tries not to harm civilians but is also casual in his brutality when he chooses to be, much like White Vision as compared to Red Vision.
Paladin could represent what Vision might become without an actual connection to humanity. A competent agent of violence, serving his own interests/survival.