I love this game.

I want to be able to make a few new factions and heros, but not sure how to go about it.

I know its possible, of course, to make a custom faction from the game, but cannot see a way to import any new images, seems as if you have to use the existing images (not that I don't like the existing ones, just that it would be nice to make some completley new ones too).

Not sure hw to make some new heros at all, there dosn't seem to be any obvious way.

If there isnt an easy way to do this could I suggest to the developers a DLC like this?