Yes, yes; the title says it all.
It was just announced by Shigeru Miyamoto that we will understand who the mystery character seen in a certain piece of art is at this coming E3. It was also announced that they’ve “flipped” the usual order of creating the game’s plotline as opposed to the gameplay:
“Normally, we create the video sequences, and these sequences are expanded. But this time we started with the game structure. And then with the video sequences. So this time it was reversed. Therefore, we have had little so far from the game to show. But will publish a lot close to the game’s completion.” – Shigeru Miyamoto
We’re hoping that this excites all of you as much as it does us!
Source: Official Nintendo Magazine