Guilty Gear Xrd Revelator Speculation

So right now we already have Johnny confirmed to return and a new character called Jack-Off Jack-O', who looks really fun and entertaining. However if you look at the character select screen you'll find one more character slot that has yet to be revealed: 



It's possible that the character that has yet to be revealed will be a returning fighter, in which case I believe the most likely choice would be Dizzy due to her importance to the story. At this point I wouldn't mind that; I honestly didn't like her in the earlier games, but now that Xrd's story has shown her being more confident I think she's getting better and growing out of being yet another Noel Vermillion. 

Other possible returning characters may be Baiken or Testament, seeing as how almost all the fighters from the first game are present. Possible newcomers for this type of game I would think would be either Gabriel since he has shown to be an effective fighter in the story and his relevance to it, or Raven. Raven would be an interesting case since apparently he had a fight with Faust in other GG media, which would make the position of the slot fit well since the overall theme of the positioning seems to be characters with some form of relation. In this regard Dizzy would also fit well enough seeing as how Faust has helped her in the past. 

Who do you guys think it'll be? A veteran, a newcomer that has appeared before in the story or someone else entirely? My money's on either Dizzy or Gabriel tbh. 


EDIT: Recent footage has confirmed that the slot is actually for random select. Goddamn it. On the other hand the fact that Faust is on the opposite side does sorta make sense in that respect.