Yeah, keep believing that Taylor Kramer was just another average Joe. You'll go far with that.
Even if there were a non-payment problem with the original agreements (which you have not proven), you still have to go back and amend it to cancel out any previous rights granted and paif for.
Regardless of whether or not it was paid in full, the fact that significant funds were transfered then sets up the problem of amending the original agreement to make sure that adequate compensation took place the parts of the original agreement that had been fulfilled.
Furthermore, there was little interaction after the 1996 agreement between TMMI and Iterated. TMMI was afterall in bankruptcy. You would have to show that Iterated acted in a way that they were canceling out the previous agreement or that they made claims on previous agreements with TMMI. But there is no legal record of a dispute between TMMI and Iterated on this issue and TMMI emerged from bankruptcy without comment from Iterated.
You need less time online play-acting investment banker and more time understanding the business world.