The King in the North has spoken ... and he doesn’t care.

When The Huffington Post asked Harington about the theory, he said:

I think you have to wait and see what happens this year, and if we find out anything more about Jon. I think Jon would hate the term ‘The Prince That Was Promised.’ If someone turned to him and said, ‘You’re The Prince That Was Promised,’ he just wouldn’t pay much attention. That’s what I love about him, so I don’t really care about it either. You know, I think that’s what’s great about him. He’s got very little ego on him.

So Harington doesn’t care about being The Prince That Was Promised. That’s sooo something The Prince That Was Promised would say ...

As for waiting to find out more about Jon, the evidence surrounding this theory is already there.