>>718691032
We don't know his kit exactly but we 99% know his Ultimate banished someone(s) to a pocket dimension where they can run to an exit. Think the Halloween maps from TF2 where you get warped to somewhere else for a few seconds.
We also know he has a "Door" gimmick where he can create a big shortcut for his team. His voicelines detail as much.
After that? I think he has some sort of grenade ability that disorients or affects the enemies accuracy or ability to aim. Maybe a passive for his 3? Unsure.