The other Final Fight question that is burning in my mind is whether or not all of the levels of the arcade game as well as the inclusion of the Industrial Area level, Guy as a playable character, and the 2-player co-op mode could've been possible for the Super NES version, had they been able to give the port more time for development?

It is noted that lack of development time was the reason for the exclusion of the Industrial Area level, Guy as a playable character, and the 2-player co-op mode, along with the fact that since the SNES port of FF was released early in the console's lifespan (1991), the limited ROM bank (8 MB maximum) also made it impossible to include these traits from the arcade version of FF.

~Ben