As I understand it, Ubisoft now owns the rights to the Heroes series and everything related to it. What if all the fans chipped in and bought the source code for Heroes 3 for the benefit of modders? The game is no longer commercially viable anyway, and this way they could at least make some money. We could find some super reliable person, organize a fund, and so on. The main thing is to get Ubisoft's agreement and agree on a price. Just imagine the possibilities that would open up for modders!
Thank you all, the topic is closed.