Really? Another Goku could be coming to Dragon Ball FighterZ? Really? Apparently so, according to reliable Japanese blog ryokutya2089. The hottest new info says Goku from Dragon Ball GT is going to be an additional DLC character. For those who don't know, Goku is forced back into the form of a child in the non-canon GT series. So while he's not quite the same fighter as he is when he's older, there's no getting away from the fact that it's another bloody Goku.
Dragon Ball FighterZ already features three different Gokus: Super Saiyan Goku, Super Saiyan Blue Goku, and Base Form Goku. If you include Super Saiyan Blue Vegito and upcoming DLC character Super Saiyan Blue Gogeta, that's technically five Gokus since they're both fusions of Goku and Vegeta. And that's not even counting Goku Black! Sigh.
If this turns out to be true, then expect to see some official confirmation very soon, supposedly through the latest Japanese print publications.
All the awesome characters in Dragon Ball and we get another Goku... It's gonna take us a while to get over this one.
Update: It seems pretty much confirmed at point, as reportedly, the latest issue of V-Jump has all the information. No doubt you'll be seeing scans of the publication's pages in the very near future.