Something makes me guess that the licensing for different scales is different, atleast thats what could be inferred when the Bruce Lee licensing was made exclusive to Enterbay and they emphasises they had exclusive rights in ALL Scales, and the fact that they could get T2 1:4 scale rights, not 1:6...
I think EB owns the rights to TDK in 1:4 therefore they could do Joker, and HT the rights to TDKR in 1:4 therefore the second suit. Yes the ambiguity is now is it movie specific or suit specific license. Whenever I asked Bill if he would do a TDK suit, he avoided the question with a 'lets see...'