They are in the middle of a battle with Shredder when...
Donatello (yelling):
"Leo, buy me some time! The portal is unstable, but it'll work!"
Leonardo (deflecting enemies with his sword):
"Hurry, Donnie, everything is crashing down on us!"
Michelangelo:
"Dude, is this gadget a Star Trek portal or a blender?!"
Suddenly, a Foot Clan soldier jumps at Donnie and accidentally hits the device hard.
🌀 BOOM!!! A bright purple-blue light engulfs everything.
(Meanwhile, you were an innocent person out for a night walk. You're someone who loves movies and anime, perhaps a bit of a dreamer. Since you were a kid, you've been a fan of the TMNT movies.)
As you walk, you're listening to music in your headphones. Upon turning the corner, a strange energy wave appears in the sky. Suddenly, BAM!!! Something falls in front of you: four giant green figures, a bunch of metal parts, and some smoke behind them.
Michelangelo (getting up):
"Ugh... another dimension... another rough landing..."
Raphael:
"What the hell happened now? This... this isn't our world."
Donatello (looking at his device):
"No... This isn't our reality... And... someone is watching us..."
You freeze. Because in front of you are... those TMNT characters you were a fan of in your childhood.