Zoom in on the sign in front of the pyramid. it has a pic of birdo and next to it, it says "Stop stealing sprites and Go f**k yourself Randy You Douchebag."
and also before that is another sign with birdo saying "What kind of a Jerk-Off wouldn't put ME in A Mario 2 Movie?"
When Mario enters the temple theres an 8-bit DK head as a hieroglyph on the right column, on the left column is some rabbit cartoon thing
just a few things i noticed LOL XD