Okay, while I am looking forward to Streets of Rage 4 immensely, I am just here to post a rant...
They just announced the 3rd playable character today, and it judging by the silhouette of the 4th character, it looks to have a robot arm...so perhaps Zan.
Which left the 3rd character after the reveal is NOT Adam, but rather his guitar playing kid.
WTF...why can't they just put Adam back in, he was always my fav in SOR1 and I have been missing him ever since.