OK, but none of those are tentpole franchises that will automatically make someone more likely to subscribe like Potter. That would be like if Disney just decided not to put Star Wars or Marvel films on their service and instead decided to be charitable and allow another service to put them on their platform. Or if Disney gave up the Pixar catalog to Apple TV+ because Pixar used to be owned by Steve Jobs.Because Universal films will end up on HBO Max...that came from Universal and WB. So I can understand the confusion on what things are going where.
(Glass, Love Actually, US, Little and Nottinghill are all Universal releases)
HBO Max Programming: TV And Film Titles That Will Stream On WarnerMedia Service – Deadline
Its a reasonable question.
You don't give away brands that will carry your service unless there's a contractual reason and I don't see any contractual reason why Potter would be obligated to go to Peacock.