Kurt Angle
Why it may be him – He is best friends with Paul Wight in real life. He can really lend a huge level of credibility to the roster in several roles. He proved he can still go in the ring, maybe not as much as before, but he can. Financially, he made need to as well.
Why it won’t be him – Like Christian, he seems like a strong fit for AEW, but at the same time he had a great sendoff with WWE. Going out as a HOF and having your last match at WrestleMania just seems fitting to me and something Angle values.