Impossible to be released with that name because if the rework respect de actual transformation you cant be master, slayer or trainer if you are the dragon. Dragon Blood Swain or something like that for sure gonna happen in some point in the future. But not possible to be released with the rework because already involve so much work and create a new base model and adapt all the old skins. They have teams working on skins following a list which never consider champions on visual rework list. You will have all his actual skins as new content and with the time maybe which you asked for.
Just think for a second last reworks like Shen, Warwick, Evelynn, Urgot... didn't recibe a new skin yet. As you can imaging there are a bunch of skins in the list that made complicated to invest time in a short space focusing release.
I also want an epic skin for Swain but not more than full reworks for Dr. Mundo, Mordekaiser, Nunu, Cho'Gath... we need to manage the hype and let time to RIOT to make everything the better possible hopefully in a close future.