Firstly I like your sprite edit, god job. Look forward to seeing more of this project.
For enemies you definitely need Foot Clan.
I have a tmnt side project started like this using those sprites, (I was just making smart pal for the turtles and making palettes later) the turtles are all red bandannas. It's nearly 2 years old, it was more for a personal project.
I had a lot of problems thou trying to find stages that would suit the style I wanted. I was also trying to find rooftop stages, there doesn't seem to be much I can find.
I didn't want to resort to stealing from other mods or mugen stages, or use stuff from well known games, but I resorted to mainly using final fight and SOR stuff because it seemed to work. Thou I'm using very faded and dark looking sprites compared to you. I'm simply changing the colours, contrast and saturation of the stages to try and fit my sprites. It's a bit trial and error thou. I also was going to have a black and white mode (those out of the shadows guys copied me!) except for red bandannas (optional) and red blood. So it's pretty easy for me to convert the stage palettes for black and white.
(actually just a select screen)
Also I had resize issues with enemy sprites. I was going to resize everything small but ended up starting over and keeping the turtle sprites size unchanged and trying to resize each enemy instead.
I just work on this mod when I need a break or a change of pace, it's got a long way to go. I'm still doing smart pals for the turtles and coding them slowly. Sprite work relaxes me and was something to do purely for fun. I only ever showed some shots to MatMan once. Didn't really plan to show anyone else, but maybe fair I mention it so you don't think I'm copying you. It would be my next project thou after doom etc.
Don't worry thou, I can tell we are making different mods. My original concept was a very violent tmnt mod, like TMNT meets Mortal Kombat, but I tamed it down a lot. Now it's more of a remake of the old DOS game 'Manhattan Missions' but loosely based on the style of the original comic with a mix of archie series, cartoon and movie elements (like the addition of Krang). Part of the project was ripping the midi's from the DOS game and making high quality WAV versions using MT-32 emulation.
Also I wanted to include the 'Mighty Mutant Animals' some way, but I was doing it by trying to sprite edit, something I'm not very good at.


Mondo Gecko concept (in my game he's a homeless skater)


Usagi concept (the samurai rabbit)
I'm sure people wouldn't like some of the sprites I've used, they don't all mix well. Also I don't mind using my imagination a bit. Like I have human versions of bebop and rocksteady that are just enemies from another game with new palettes. Also I'm kinda mixing up the story to make it's own version of tmnt which people won't like.
But yeah the stages thing, I don't mind if you use the same stuff, I might not ever make my mod for release anyway. I have other mods I concentrate on.
These are what I decided to use, because some were already in openbor mods (like final fight) I borrowed them for testing, so I know they work.
- Final Fight series
- Streets of Rage series
- Sailor Moon series
- Crime Fighters (started ripping these myself in MAME)
- others I forget, will check and let you know, like random SNES games
I couldn't find good rips of many stages thou, even stuff that is in openbor already I can't find any good public rips for some of them.
Have you got any stages in game yet that you want to match the style of?
I have stuff saved I don't even know or remember the source of, but I could show/send you them.
Also I have sprites you could use if you like, thou I'm still working on them so they're not final.