The mystery behind Sonic 2's Soundtrack

In this video, I present a theory that shows the Sonic 2 soundtrack, as we know it, was made for the original game plan of Sonic 2, when it had Time Travel. I show how it's possible that the Sky Chase music was composed for a cut level, known as Rock Zone. I also tried to find connections between the Concept Art Pieces, Prototypes, and Interviews.

Credits:
Thanks to Airrel for helping me with the script, video format, and English
ChilliusVGM for the Sonic Mania gameplay and helping with English
OKayDoKay for helping fixing English errors
Moola for checking if the Sky Chase sheet was correct
Airrel is a very talented game developer, check his amazing work:
https://airrel.blogspot.com/
  / artcielofficial  
ChilliusVGM, OKayDoKay and Moola are very talented musicians, check out their amazing work:
   / chilliusvgm  
   / @e3kay324  
   / @moolamixtape  

Links:
Hirokazu Yasuhara talk -    • Hirokazu Yasuhara - How to make a gam...  
Brenda Ross interview - http://www.sonicdatabase.com/
Sonic & Knuckles Mushroom Hill Concept art - https://info.sonicretro.org/Sonic_%26...
Sonic 2 Concept arts and documents - https://info.sonicretro.org/Sonic_the...
Sonic 2 art disks - https://megabitesblog.wordpress.com/2...
Banper concept art translation - http://info.sonicretro.org/File:Sket_...