I don't think there's any doubt that Halo will be coming to Playstation, it's just a question of when (not if). I don't think it'll be day and date with Xbox, but probably within the same year. Xbox doesn't care about exclusivity anymore, the only think they care about is being the world's biggest publisher and making as much return on investment as possible. That's why they're trying to get Game Pass on as many screens as possible.
The earliest this new Halo game will release is Holiday 2027 anyways, so I don't see any need to get worked up about it just yet.
