This fictional character in this fictional universe is veeery aware of what he just sacrificed by becoming mortal. And I'm sure you all know it wasn't just so he could feel his heart beating again. He is about to show us why he is final villain material. Madara doesn't do anything without purpose. His elaborate plans span over decades. He is confident in whatever he's about to do, and I personally cannot wait to see what he is about to unleash!