Temple of Elemental Evil featured what is to this day the best translation of D&D to the PC. Sadly, there only was one game using that engine. Were there any plans to keep using it for other games, or perhaps license it to other developers, in a manner similar to the Infinity and Gold Box engines?
Yes, we had great plans for that engine. For the sequel to The Temple of Elemental Evil, Troika proposed using the super-module GDQ: Queen of the Spiders, which consists of seven modules from the popular Giants and Drow series, plus the special Q-series module that completed the adventure. In fact, we were going to let the players bring their characters over from ToEE directly into the QoS, so they could simply continue playing with the same group of characters.