I believe he's eligible to return starting January 2021. Recent pics show him as being pretty yoked, certainly not looking like a bantamweight. I suspect a lot of his PED use likely had to do with the weight cut itself just to make BW, and to a scarier extent, flyweight.
Would it interesting to see him come back as a Featherweight? I know he said he believes he'll get a title shot upon his return, but that doesn't really mean shit. Certainly wouldn't set a great example.
Where would you like to see him come back at? I think featherweight is super deep right now and there's a ton of interesting prospects all over the map. Sodiq Yusuff, who's 11-1, is the #14 guy in that division. Ryan Hall is #13. TJ has the athleticism and power to probably hang in that division, but obviously, one has to consider what two years away from the game might do to his performance.
He could also go back to the newly-infused BW division. There's always Cody, or maybe one day Yan. Coming up, you have O'malley, Dvalishvili, etc., so it's at least a somewhat different look than it was when TJ was ruling the roost.
I'm just going to assume that flyweight isn't likely happening due to the weight cut.
I'd still prefer featherweight, personally.
So, what does the UG think? You'd might as well put your hate aside for a moment, because he's most likely assuredly coming back, and when you set aside the PED stuff for a second, the guy is a very talented fighter, so his return could make some waves if he can recapture some of his old form.