Ninja Turtles; The next mutation, thoughts on possible ending?

[turtlefanforever]

Not many people liked it but quite a few enjoyed it. I thought the ending was very lackluster and made up a bunch of different ways the show could have ended and answered all or most of the questions. What do you think would be a fitting ending? Any ideas? Please be nice and respectful I just want to have a discussion, don't say something like all of them dying or the script being burned.