When will Anduin start riding Wrathion?

It’s been quite a few years since Cata, so Wrathion shouldn’t be a welp anymore. He should be a small drake at least, especially since dragons age differently from humans. I think it would be super cool if Anduin eventually started riding Wrathion into battle.

Dany from game of thrones, Tyrande and her nightsaber... those kind of entrances is what Anduin needs to do.