Now that's a game I wouldn't mind a rewrite of. Imagine Heroes 3 with a modern engine and modding available out of the box instead of people having to reverse engineer it just to keep it alive today.
Hdmod (not the money grab hd edition) is a good nodernized version with lots of QoL, modding scene is active and there is also VCMI engine. All working fine
I would pay for this.
You'd probably have to redo the art though, since 3DO will unlikely do this port and I doubt they would licence the IP.