The MUTO looks a lot like Megaguiris. Even though we know she won't be in it.

So I was doing some detailed watching of the trailers for the new movie and I stumbled upon a scene in which I had to pause and go back to. I took a screen shot and reviewed it from there. What I saw was something that resembled a Megaguiris, this is impossible when it was announced that no TOHO monsters would make appearances.