Jal Phoenix,
The Shadow Hawk 1R has recent artwork that is brand new -- I am guessing that indicated approval to do its image. IWM has largely gone with "if it is in a book, then we can do the mini" except for the Unseens. This whole Unseen/Reseen business is aggravating. The Thunderbolt was one of those in the re-released 3025 ( or was it 3039? ) TRO that had a blank white outline of the mech instead of an illustration. That was the most recent "inclusion" of that style of Thunderbolt ( non-Phoenix ) in a TRO as far as I know ( just the text and no image ). The Thunderbolt, to my knowledge, has no recent reseen new art images. I tried to verify the legitimacy of the reseen Thunderbolt before I approved the fan-funding and was assured by the funding organizer that it fell into the reseen category ( and I fervently hope he was/is right ). Again, I hope this is just a super-precautionary step rather than a likely deal-breaker.
Rob to paraphrase from Star Trek -- "Damn it, Jim, I'm a doctor not a lawyer!"