Quote Originally Posted by Ametrine View Post
Actually, SE stated that upgrades will launch upon Heavensward release that will make players who aren't playing in the expansion areas still have the ability to work with players who are.

I think, that if this is the case, you will be able to use your own Au Ra, since the data will be there for you. Just not in new areas.
They have stated that items, characters and such will be available, but don't expect to be using that black chocobo or going to any new content or areas. Items will be there simply because they are accessible by mb. No new items=no mb