No evidence, I'm just thinking of the (yawn) Kaz/Daniels storyline. They have to wrap it up somehow, and if it's just something like AJ having an affair or something it'll be pretty anticlimactic.
But if they come up with something like, "AJ has been putting an a nice guy façade for years while secretly doing bad things to cement his place in the company", it could give him the jumping off point for a heel run.
Two real life things that may also be relevant. 1) He's "Mr TNA" yet he's been used/underused horribly for quite a while. His ring work is still great but he's gotten stale as a presence. And 2) I haven't heard anything new about this, but apparently he's injured now.
So something shameful that exposes him as a heel would give him time to "run away with shame" or "take time off to hatch the next step in his devilish scheme" or something (while healing), then he could come back with a new gimmick and fresh impetus in a few months time.
Thoughts?