AEW needs to convince a really high level NFL/NBA guy (or several) to try Pro Wrestling, someone like JJ Watt, Von Miller or Aaron Donald who are done with the football lifestyle but could do some Lesnar-length stints a few times a year.
Any of those 3 would immediately become the focus of the entire wrestling world and borrow 200-300k WWE viewers per week for at least a few months, depending on how things developed. If you treated them more like Omos and less like Action Andretti -- no neck bumps, no off the top rope moves, no getting dumped over the top rope, no jobbing to Eddie fucking Kingston, etc -- it would be must-watch TV.
It would flame out eventually if there was no commitment to actually become good at working, but for a while, there'd be a shitload of attention on AEW. If I'm Tony and have $30-50 million to burn, that's what I'm looking at, not some random indy/NJPW/Stardom shitters that won't draw any better than Kiera Hogan, Top Flight or anyone else already on the roster.