Still miffed that there weren't enough characters in Guilty Gear Xrd? Well, the Revelator update is getting Johnny and Jack-O, but it looks like more might be in the pipeline. Arc System Works is opening up a vote in September for Japanese players, and it involves picking potential new characters.
Check out the full list below, but note that while it is pretty extensive (Fanny!), it doesn't include everything. My vote is for Kliff -- the first Guilty Gear character I ever played in the original game.