I am not seeing any option for it in the in game store, but I’ve seen reports from PC users that they can do it
There should be. Check back at 5pm PST. If you don’t see them after that please let us know.
I would guess tomorrow since that’s the actual release date. They said they’d update this thread when everything is for sale: Patch 2.0 (Xbox One, PS4, PC) -- New Characters are now LIVE