About the C/Square button...

So everyone is wondering about the C Button and it's function. And people have theories like: "what if it's a chat button?" and "could it be a button for multi combo action?". But to me, I think it's gonna be a multi function button like how the minus and plus buttons are! And this video by Endo talks about it at 5 minutes and 3 seconds: Endo's Video. End of story.