I highly doubt they have a build of the game that has these animations anymore. Meaning they'ed have to remake them.
Even if they still had a build with the animations laying around somewhere it would still be a lot of work to fix them. As part of the reason they were removed was due to how buggy and confusing they can be. I don't think it's realistic to assume they will ever comeback even as repurposed animations for new moves on a hero.