I know there werent any updates on the ingame progress lately, but I can assure you that I have been working on it.
SSJ4 is ingame, rigged on Goku's skele, got all the needed extra bones and already replacing Vegeta.
There's a major issue though, which I'm too lazy to say at the moment but you can read all about it in the latest thread I made in the 1.3 bugs.
To sum it up, not all animations react well as a custom for Vegeta...
I already started animating a few basic stuff, going pretty well if putting that 1.3 bug aside, I'll make a short ingame video soon. ;]