Super7 hasn't confirmed anything, but then again, I don't think tomorrow is exactly promised to them at this point. The assumption going around though is if a character or accessory only existed in the toyline (or perhaps because of) then it's Playmate's and Super7 can't do it. If the design appears elsewhere (the rock n' roll turtles are a good example as they appeared on some licensed products back in the day) then it's fair game, but Super7 can't copy the accessories directly. For Rat King, one can notice they were able to basically recreate the sculpt of the toy because of some exceptional circumstances, but none of the old accessories were recreated. Even the dead cat belt had to be changed to a bandolier. And also hurting them is the fact that NECA gets to do the cartoon stuff so that might close that out, though I don't think it's actually written into a license agreement or anything (from a legal standpoint, it sounds like both NECA and Super7 have essentially the same deal), but if Super7 starts doing characters from the cartoon then NECA might start complaining and I would guess Viacom is getting more money out of NECA than Super7 so they're likely to get their way. I would also guess that a lot of these vintage reissues from Playmates stem from their conversations about Super7 and strengthen their argument. At any rate, if the 2k3 stuff is selling as well as Super7 claims then I wouldn't be surprised if the vintage inspired line is dead which is going to really tick me off since they have yet to do Heavy Metal Raph.
It's good to know of another place and option to be able to get it.