Big improvement with your changes, especially with both forms of Akuma. His colors originally looked washed out or drab. (I mean really, all white as his secondary color?)
I'm definitely interested to see if you plan to continue this for the entire roster.
This is very freaking cool.
It sounds weird to say "thanks" (for contributing) or "congrats" (on completing your hard work). Is there a word sufficient for this situation?
Very cool idea. I'd like to see more.

You plan on hacking the backgrounds? If anything they can use some refreshing recolorings the most.
edit: but seriously, nice work.

The backgrounds would take a ton of work

Are you a bad enough dude to rescue Ronnie?
I'm amazed, this opens a ton of excellent possiblities. I'm fond of the color schemes already in the game, but man! This ones you presented kick some serious ass.
Seriously, forget about the HD facelift to SFII Turbo...this is a potentially dramatic visual facelift to a NEO title so it's got my attention for sure.