#2 Chris Jericho
Chris Jericho was one of WCW's brightest young stars before he left for WWE, and 20 years later, he's still as good as ever, and ready to capture the first ever AEW Heavyweight Championship. No one in the history of wrestling has been as good at innovating and constantly evolving, and right now, Jericho is still a main event level talent (arguably the biggest draw in AEW), and that's incredible given how long he's been wrestling.
It's hard to tell which singles bout will be the main event of Double or Nothing, but it's safe to say that Omega vs. Jericho should be that match, and it could very well mean the difference between being the first AEW Champ and not. Regardless of what Jericho does in AEW, it will only strengthen his case for being the G.O.A.T in the wrestling business. Being a Champion in WCW, WWE, NJPW and now AEW would make his case very hard to dispute.