I've said it before but Lashley needs to destroy some folks in NJPW (or All Japan, NOAH, etc). I want him to get one of those titles. The man is an all star, a legit threat. He's dominated in North America, beyond AEW I want him to dominate in Japan too. Lashley is not too old to make moves.
If he wants to work with AEW I think that's the better way to go about it instead of being signed under them directly. They already have a working relationship with New Japan, best of both worlds.
I think he's already done everything in TNA, beyond a short trip there I don't believe he needs to revisit long term. There's other companies for him to tear through.
Wherever he goes I hope he finds success. If you're booking a wrestling company and you can't find something for a healthy Bobby Lashley to do then it says a lot about your booking.