So would it be pointless to pre-order KH 2.5 or KH 3? Would they really deliver it, or would I just be ripped off (or would I get them first?)
No. I mean, you'd at least be guaranteeing you get the game, it's just that whenever it does get a release date (both games) they'll change the date to then and send it to you then. It's not like you'll be getting the game anytime ahead of anyone else and there will be a while before you need to preorder it...