Jay saying 'objects in mirror are closer than they appear' is a reference to Jurassic Park.

Nya saying 'never tell me the odds' is a reference to Star Wars: The Empire Strikes Back.

When the ninja are walking to the crowd, several items are seen:

-A sign that looks like it's advertising Kai Action Figures.

3 'snake biting it's tail' symbol.

An ice cream parlor.

A video game arcade.

2 yin and yang symbol.

NFC signs {two of them }, obviously a reference to KFC.

A sign that, to me, looks like it's advertising Kim Possible.

And bottles like we've seen in several episodes before.-

When Jay and Zane are jumping/flying in slow motion, there is a visible Sitar Legend sign behind them.

When Jay is about to jump into the not yet finished building, there is a small sign below the Devourer that says: 'Take a break! Visit the mountains!' (I think everyone in the city wanted that.)

When there is an out shot of the Great Devourer being tangled, there are many ineligible signs. There is, however, one Sitar Legend sign in the far back and left.