We’ve got a lot of themes in Dota already. Gods, demons, dwarves, elementals, forest dwellers, goblins, etc.
I’d like to see a chaos themed hero. By which I mean chaos theory, fractals, butterfly effect, etc.
What other concepts are people still unexplored and sound interesting?
I always had a secret hope that Invisibility and Ethereal would become like an alternate dimension. Anyone also in that dimension could see and attack them.
We got a bit closer with the Revenant’s Brooch and Muerta.