Ted was so vain that he modeled the swarm's AI on himself, wanted to know that even after he was long dead the "peacekeeper" robots would be taking their orders from his image, immortalizing himself.
Ted had a fucked up sense of "I know what's right for humans, and I've already set it in motion", AI Ted will have the same, the Robot Plague wasn't just killing people, it was digitizing them.. "The best way to save people is to remove them from their frail bodies."
Aloy naturally goes to fight the new threat, is confronted by an aged rebuild of Elisabet Sobeck, claiming to not only be her in body, but also mind. Internal conflict.
Humanoid robots make an appearance, Aloy conflicted as to whether they're actual people or just machines. Horizon had a lot of pretty fucked up stuff under the surface, time to see it directly. Androids "killing" Humans, later in the story have several androids have freak outs about what they're doing, turning on other Androids, killing themselves, begging Aloy to stop them, etc.
That's the type of setting/tone I want to see in a sequel, don't Metroid Aloy, losing her weapons/tools..Just increase the arsenal into some more hi-tech stuff. Add in better Hacking/Machine control (Fuck you to those challenges that say I can hack a Thunderjaw and let it shoot the Ravagers, can't count on them doing anything at all other than charge and melee)..Expand the map, include the entire original playing area, with changes from the final battle/new stuff being built, add-on another 1.5-2x from the edges..Bring back some NPCs to give an update on how their life went after the 1st game.