I honestly think that's probably the best place for him. With AEW bringing in Andrade and probably Black I doubt Joe would get much of a run there with their bloated roster.
People talk about Impact, ROH or NWA. But, honestly, those are really just indy promotions at this point. Joe going to any of them seems pointless and a huge step down. An example of what I mean is NWA drew 500 buys for their last event with Aldis/Murdoch as the main. 500!
I guess you could argue Impact, but the promotion is so different from when he was there that I just don't see any huge nostalgia for it. And once the Omega angle is dead they'll basically be a slightly higher version of NWA again.