I'm fairly certain that has Jordan will not be in the arrowverse because in the trailer for the legends of tomorrow there is no mention of hal jordan. There's nothing in it that would lead me to believe that green lantern would make an appearance. I mean don't you guys think green lantern would show up in legends of tomorrow if he was part of the arrowverse? Now I'm all for it. Green lantern might be my favorite DC character. I'm telling you why I don't think it will happen. Plus I don't know if the cw would be willing to spend that much on CGI.