Board Thread:General Discussion/@comment-31255465-20170923034221/@comment-33378883-20171225165744

The Iconoclast wrote: Nangbaby wrote: . The mutagen bomb is definitely technology from The Kraang, although that doesn't mean they launched it. Triceratons, perhaps? They could have easily stolen and modified some Kraang technology.

I agree that, like "Same As It Never Was", this could be only a possible future. The secret to preventing the apocolypse must lie in one of Raph's lost memories, likely something that, at the time, seemed insignificant.

That's up to us to decide. What went wrong in this alternate dimension?

However, as Easol1 said,  The showrunners did originally intend this to be the true ending, despite the major continuity issues that prevent it from fitting into the canon timeline and for very dubious reasons. Thankfully, Nick overruled them :)