I've been doing thinking, and I have an idea for a fan made tmnt comic series. My lazy ass won't have enough motivation to do it, but it's a concept.
The main focus of the comic would be on Donatello, starting off with a fight with the Shredder. Donatello would had been beat the most to the point where his shell gets cracked (cheesy ik but just wait ok). He would be temporarily off the team until it fully healed, but he would be sneaking out when everyone is sleeping. The comic would focus on how he tries to beat the foot clan on his own without his brothers knowing, with him eventually getting caught. His brothers don't notice the foot clan managed to capture Donatello, since he would usually be in his room all the time. That is until they get into another fight with the Shredder and see that Donatello is being forced to work for Shredder. They try to convince him to help them fight Shredder, but Donatello is angry at them for basically kicking him off of the team and would continue fighting alongside Shredder until Michelangelo almost gets killed by Shredder. Donatello would see this and wait until Shredder is distracted to use his bÅ staff to hit the back of Shredder's neck (which idk if it's true but apparently if you touch a certain spot on the back of someone's neck, they can stop breathing for minutes at a time) and Shredder is momentarily stunned, long enough for the other turtles to get him VERY injured and unable to fight.
This is, again, just a concept, and I may add more later. If anyone is interested in this, or even has ideas to add on to the story, let me know in the replies because I kinda thought of this while in the e.r. and watching an analysis of the idw comics.