For such a short running length, the film juggles a bit too much for its own good. There's the story of the immortal, his generals, the reformation of the group, April and Casey Jones' (Chris Evans) relationship, even the Foot Clan makes an appearance. To 'TMNT's credit, it manages to successfully take on most of these threads, but each one could be its own film for crying out loud and as a result, none really get the time to breathe and simply exist, it simply gets dragged from plot point to plot point. The film is at war with itself, on the one hand, it needs to be about the Turtles and their struggles with each other, but on the other, it wants to be something epic and the two never quite mesh because beyond the inevitability of the end of the world, the Turtles are not vested in the situation between the immortal and his generals.