Nice, but this doesn't appear in S3&K, like I said before. For all those who don't know, Sonic & Knuckles featured a add-in slot that allowed you to play past games with knuckles. Sonic 3 & Knuckles was designed as one game, but produced with two cartridges. Thats why there is so much continuity between the two games.
OK, EVERYONE PLEASE SHUT UP
The track that will be used is the track that Rayza and Sora are doing right now. Which is the Sonic 3 credits. NO the sonic and knuckles ending will NOT be included. There should be NO MORE disscusion about it.