Originally Posted by
YourMaster
Well, what's a completely new unit,.... if you want a balanced game you could make your own 'campaign', with completely different creatures in everything except how they look. You can have powerful fire-breathing flies and miniature giants that can cast lightning with stats you decide completely by yourself. In this campaign you put some 'skirmish' maps which you modify to allow heroes to come from portals for some players and you almost have your dream game. And you could have the regular game intact so you could still play custom maps of people the way they were meant to be played.
Making new creatures with new looks is technically possible, but requires an awful lot of work and talent so it might as well not be. If you do, you'd technically be limited to the same number of creatures that are in the game now, but Mefisto could change that. He hasn't yet because nobody ever made a new creature for the game anyway, and most likely nobody ever will.