Here's an idea I came up with. It's a stage mash-up between Gravity Rush and DmC Devil May Cry. You start off at Auldnoir, a city in Gravity Rush, fighting on the ground and on top of buildings. In the background, Raven and Yunika, (2 characters from Gravity Rush), are fighting random Nevi, (enemy's from Gravity Rush). Later in the fight, the ground will start to shake and tremble. In the background. Raven and Yunika defeat all of the Nevi and turns when they see the area shake. (There will be buildings in the background). They notice the sentence "YOU ALL MUST DIE!" appearing along the buildings in the background. The battle area, (as well as the background), will crack, (so you can see where it will separate), burst and separate into platforms. You're now in Limbo! Music from DmC Devil May Cry starts playing and the Hunter appears as your stage hazard. He jumps onto a platform in the background (created from the ground separating) and knocks Raven and Yunika away so he can do every thing in his power to destroy any living thing on the battlefield. At about 15 seconds left in the match, Raven and Yunika reappeear and takes the Hunter down!
Here's a picture of the Hunter
Here's Auldnoir (Old Town) BGM
(Note: This song isn't anywhere close to a fighting song, but then again, look at Dreamscape, Franzea and Time Station)
Here's the Hunter Boss Battle song (The song that will play when the mash-up happens)
Here's a picture of Kat, Raven and Yunika
Here's a picture of some of the Nevi
Let me know what you guys think! ^_^