They said world transfer would be available around 3 weeks after launch. However they didn't go into specifics about restrictions between going legacy -> new or vice versa, and will be giving out more information closer to it being available.
So yeah, it will exist fairly early, but if they're sticking to what they said earlier on there will probably be restrictions on going between legacy and new servers at the start.
So yeah, it will exist fairly early, but if they're sticking to what they said earlier on there will probably be restrictions on going between legacy and new servers at the start.