#until it ends

Im going to mostly focus on Donnie’s role as leader here- since that is probably where my interp of future Donnie differs from most fanon, but I can go into his interpersonal relationships and other details at another time too if that is of interest.

I like the concept of Donnie taking the lead at the start of the invasion due to Raph and Leo’s conflict that we see at the start of the Rise movie. Raph has learned from the end of the series that their way of life is not just dangerous, but is life-threatening. He’s seen this through Splinter’s memories and the death of Karai. So post-series and pre-movie, he wants to impart that onto Leo so he doesn’t have to learn it the hard way by losing people. Leo sees this as a lack of trust in his abilities and a criticism of his leadership, and gets defensive as a result. They both want to see their family succeed and thrive, but ultimately get in their own way while doing so. They are teenagers, they get insecure about their place. It unfortunately happens to play into a larger conflict they had no knowledge of.

This conflict and strife is what brings the team to fail circa the start of the first Krang invasion. Leo and Raph’s fears both come to light when they lose and resentment has the opportunity to boil over and poison the team’s dynamic. As such- neither are in the right mental or emotional headspace to lead effectively.

Enter Donnie. Donnie already has had a few lessons in leadership without actually taking on the position in the past. We can see this in a few circumstances.

In Donnie’s gifts and Mind Meld, Donnie is doing what he thinks will be best for the team. He gives his brothers technological aid (just as he has given himself with his battle shell) and enhances their mental performance (in a way that is exactly like him, focusing on intellect rather than other points of knowledge). And it doesn’t work because his brothers are not Donnie. He is the brother that probably understands best that trying to get people to do things the way he would, rather than they would, is not the way to lead.

These circumstances also help to expose Donnie to failure. Of the turtles, Donnie has had the ability to fail and recover quite often (Lair Games anyone?). To fail is to be a scientist. It doesn’t paralyze his decision making process as badly as it might with his brothers. He just pivots to find the next thing that could work. (and some things he’s just bad at, but he does anyway!)

Additionally, I headcanon that Donnie is the turtle that came to terms with his and his family’s mortality first out of the brothers. The creation of his battle shell is especially telling here, but a majority of his tech also reflects this. The Turtle Tank having defensive and offensive capabilities, Donnie’s gifts, the Donnie pods… Donnie knows that at any point, something can come around that can hurt his brothers and take them out of his life. So- he chooses to focus on evening the odds rather than despair over the possibility.

I also headcanon this as to why Donnie is less in tune with his mystics at first. Hamato Ninpo is triggered by the desire to protect the family. Donnie’s always been able to protect his family with his tech. It’s only when that fails that he needs to look inward for other options. (Example- Raph unlocks his mystics when he jumps after Leo from Big Mama’s roof. Donnie didn’t need to. He had his tech to protect and catch Mikey). And it still manifests in the way he has protected his family in the past- through manifestations of things he can build.

While this has led him at times to feel that his tech is his best and only contribution to his family, he has also had opportunities to accept that isn’t true. This is especially evident during his time in Witch Town. He failed, seemed discouraged and hopeless about who he is and what he is able to do- but April pulled him out of that. It is just really unlucky that Leo didn’t have that chance as leader. His first major obstacle just happened to be near unbeatable.

End-all-be-all: Donnie understands he can’t do everything himself. He understands that he needs other people to succeed and people have areas of knowledge that he may not understand that will push them to their goal of survival. He’s grown out of his pride to an extent and is able to see how to make up for his weaknesses with other people’s strengths (though his ego still can surface, he is still a kid after all).

These experiences and details all combine into how I see Future Donnie operating. He makes sure people are put into positions where they can thrive and in positions where they can fail safely. He doesn’t want people to get discouraged at their odds, so a structured environment that is built for learning and growth is his focus for regular, non-leadership positions in the resistance. He’s seen how pressure has impacted the people in his family (including himself) and doesn’t want the life threatening and dangerous world they now inhabit to lead to an implosion of panic and hopelessness through any level of his ranks. He knows firsthand that is the best way to lose.

He also employs this logic with his inner circle. Mikey is a particular asset when considering the well-being of people during their day-to-day operations. April’s extensive experience from her many different jobs makes her personable and versatile in assigning positions. Raph and Casey aid in training staff and soldiers and Leo focuses on scouting and recon. (Donnie also makes sure people have a rotation through positions they are good at, positions they like, and positions that they need multiple people to learn. He doesn’t want anyone to feel like they are “just the science guy” or anything of the sort. He feels that the focus on roles in his family did ultimately lead to the divide that got them in this mess).

I like to think that if the Krang were any less unbeatable and Donnie and his family actually had time to prepare in the way they did with the Shredder- Donnie’s leadership would be successful. He got an impossible hand, but also does help queue up their actual success in the movie.

This turned really long- and I apologize if it isn’t exactly the answer you were looking for. But I absolutely love the purple turtle and could keep going on and on if I don’t force myself to stop here. Thanks again for the question ❤️