Batman cartoons have a history of being the strongest animated features in the dc animated catalog, the turtles tend to be a bit more hit and miss especially when it comes to character writing and character design. This movie seriously is all over the place it has cheap looking character designs with some brilliant backdrops mostly because they make gotham look like the 90's batman cartoon. Then when it comes to the action it's very cartoony and childish at times then we see characters who are brutally murdered being impaled from behind or decapitated. example.
When Batman meets shredder a foot soldier takes a ninja star to the center of his head and blood is apparent then batman and shredder begin fighting shredders blades slice threw bat-a-rangs like butter but then they i guess become plastic, as Shredder and bats square off in hand to hand combat. Shredder then performs some mystical airbender type move and i assume shatters batmans ribs? then shredder just leaves instead of killing him (convenient). batman shows up two seconds later meeting the turtles for the first time, they fight and batman wins? so batman with solid wounds defeats all 4 turtles proving the turtles are pretty useless (so thats cool).
Later the turtles just "break in" technically just swim a far distance into the batcave. lol what?! the turtles just show up in the most secret lair ever? pizza references happen a few times and then ooze is a strong plot in this horrible montage of a storyline. This film put in too many villians and too many storylines that nothing is accomplished nothing is really concluded. also spoiler, (not really a spoiler) once bruce wayne suits up you never see bruce again so that's neat i guess. damian wayne who has been introduced into these animated films as a badass over tempered killer who is trying to be less brutal is turned into a pathetic joke. Not to mention ras-a-ghul is defeated by a kick to the groin lol (screw you movie) honestly they give mikey cringe worthy "jokes" and dialogue that is so brain damaged that its hard to like him. splinter has no part in this story which is insane considering we waste time on characters like harley and scarecrow. harley ended up being one of the best characters in this story somehow probably because tara strong actually reprised her role. Dont get me started with the joker ooze plan it's just lame and lazy. This movie is has brutal imagery mixed with 5 year old type dialogue and animation so honestly i have no idea who the target audience is for this.
I was even disappointed in the technical aspects, again character design is pretty cheap feeling, the audio is terrible! voice actors feel kind of auto-pilot and there is no background or ambient noise in the entire film its just basic sound fx's and dialogue, no echoes, no dripping water or beep boops from computers or electronics unless they are being blatantly used (that was mostly an example from when they are in the batcave but it happens in every scene}. this is a lazy storyline with lazy production value. watch if you want but I wouldn't pay more than a redbox price for it.