I'd still say it's Archer. With Jake coming in for those promos during the live shows, it was always really clear that Archer was going to be given a really quick build. Especially because of how Jake was focusing so heavily on Cody -- who we know is completely disconnected from the AEW World Championship picture.
If it wasn't Archer, I'd think it was MJF. Best heel heat in the company, but not necessarily the draw for main event status yet. Then again, as others have been saying, he could have been fed to Mox and the build for that would have been awesome.
If it wasn't those two, probably PAC. Man, how great would a PAC vs. Darby feud be right now? Mr. Brodie is going straight for the World Championship, imo. Same with Page after the tag story is over. Fenix still gotta be on a path to the tag title. Sammy's still being built up, have that relationship with Jericho lead to something. Darby's a better person to chase the belt than to hold the belt, at least to start. Hager's hopefully going in the bin for a while. Wardlow needs more matches.
Yeah, definitely Archer IMO.