The downloadable content adds a new game mode and character colors, as well as new playable fighters, including Usagi Yojimbo. Here is an overview, via Dotemu:
A Multiversal Melee Awaits
Chaos! The Neutrinos crash the Turtles’ latest pizza party! The teenagers from Dimension X are in dire need of help: Shredder is seeking to conquer the multiverse itself! Our heroes need to jump between dimensions and stop Shredder once and for all.
New Playable Characters Join the Party
“Dimension Shellshock” brings new playable fighters, including the razor-sharp Usagi Yojimbo. The steely rabbit samurai is ready to hop across dimensions to fight evil and witness a new style of otherworldly battles awaiting the Turtles.
- Explore dimensions in an upcoming new game mode. Additional details coming soon.
- New playable characters including Usagi Yojimbo.
- Exclusive color palettes to unlock. Take a stroll down mutant memory lane with new oozy hues.
- Amazing new tracks by Tee Lopes.
Watch the announcement trailer below. View a set of screenshots at the gallery.
DLC “Dimension Shellshock” Announce Trailer