No Goku. please. I find him a terrible character who is mostly uninteresting and often requested because it was persons first anime. If he gets in, then there is nothing stopping the Sponge Bobs, the Barbies, the Spidermans and the Tony Hawks from being requested and memed into the game. There are so many great video game protagonists that still have not been added (with many being miied or ATed) and they deserve there shot well before a "4th" party character.
As an example. People have been clamoring for Ryu Hayabusa. If Goku is added, his position on the list of possible drops significantly. Because now Shrek, Goku, Vegeta, Naruto, Saitama, SpongeBob, Ninja Turtles, Batman, Superman, Barbie, Lego characters, Tony Hawk, NFL football player, Michael Jorden, John Madden, Scrooge Mcduck, Mickey Mouse, and any other super big licensed characters would be viable. Since their sales numbers would vastly outgross Hayabusa, say goodbye to him.
No. No Goku.