@ryomaneo
Thanks for the support!
Just to clarify, we're both working on two different mods, but sharing ideas/resources etc.
The mod therain237 is making seems like it will be canon and more pleasing to fans.
But I'm taking creative license and sort of creating a new TMNT universe, based on who and what I want in the game. I'm basically blending the original comic series, archie series, 1987 and 2003 cartoon series. (and some tiny aspects from the movies) The story will be centered around the early parts of each series.
I don't think I will have a detailed story, just cut scenes etc. with minimal dialogue. The game will not be linear, you will choose where to go next, just like the Manhattan missions game.
- My test map
The missions from that game will be added (but altered) and additional missions and story added. Like encounters with people like Rat King, Leatherhead etc. The setup is pretty basic in that game "hey those guys are doing something bad, we better stop them' type missions.
Each mission has 3 parts to clear, each part is harder than the next. When you clear part one you get sent back to the map and part two will take it's place. You can start part 2 if you wish, or do another mission first. This is what was cool about the original Manhattan Missions game. Anyhow long story short it will be more about gameplay and less about story. It will be something you can play differently each run, rather than a linear set of stages. This also makes it much easier for me to make a game without having to rationalize stage progression.
I don't want to be misleading to anyone, I'm not trying to make a game for fans, more for my own tastes. So there is less confusion, I'll explain what my story and characters will be. (and because you seem interested)
My plan was to start you off with random punks/gangs, slowly introduce the foot clan and purple dragons.
(various enemies from SOR, Final Fight, Crime Fighters etc.)
The foot and purple dragons will have an alliance, Hun, Tatsu and Karai will be included. Foot clan will be real people not robots, Shredder will be human, like the comics and movies.
Bebop and Rocksteady will be included, they will start as (human) purple dragon members and eventually be mutated.

(concept sprites only, I have other bases in mind too)
To fight the
'Turtle Menace' Shredder insists that Hun select members of the purple dragons to be trained in martial arts. Thou he denies any of them to be considered foot clan. So you will slowly start to encounter punks and thugs packing ninja weapons rather than knives, chains and baseball bats.
Baxter Stockman is also planned as a character, he will probably be the archie/'87 cartoon style Baxter - not because I prefer the white baxter over the black one. It's just because I have sprites that suit this style without much editing
(well I guess I could change skin colour, but might look wierd)
I will introduce Tricereton's and the Kraang and the whole TGRI/TCRI thing.

(Krang or the Kraang - concept only)
I'm also going to somehow include the 1987 Krang and ally him with Shredder. Then introduce robot foot soldiers, Dimension X. Also I want to add the 'Mighty Mutanimals' as playable chars, at one point it was just going to be a Mutanimals mod.
I'd really like to add Slash as playable too somehow.
The gameplay is not based on any games, it's just openbor type gameplay

It's shaping up thou and I think it's fun to play already. It's nothing like bWWd's demo, it's a slower pace, resembling Manhatton Missions. Similar to that game, holding different directions control your attacks, but each have their own combos. I'm trying to add many cancels etc. so you can mix attacks and combos together, which is why I've been working on Raphael for so long.
(Sorry for the epic long post, but thought I should explain the whole thing)
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@ Anurizm - I use neither sorry, PM on this forum is best way to find me. That'd be awesome if you can help with stages and sprites thou. If it fits the current style I've got at the moment, I'd be happy to use anything you wish to make.

Also some chars/enemies won't need editing, just need a nice new palette that fits the game.
I had to add enemies to the game just to see if they're sprites even work together, some had to be re-sized so now they look crap and I don't want to use them. There's quite a few I'll have to discard, so I'm short on enemies again. I really want to add as many common punks/thugs etc. as possible, so it's not a bunch of remaps and aliases.
Any suggestions are welcome!
Cheers!
- BeasTie
*collapses on keyboard*