Not as good as part 1 or 2 but still fun.

So instead of Batman going into the TMNT world, or TMNT going into Batman's world, we have a new universe where Bruce was raised by Splinter with the turtles as his brothers. It's a unique idea but one that doesn't fully work for me. Mostly cause it's just a rehash of same villains but slightly different, I think all new villains and world would have been more fun.

But overall it's decent fun multiverse storyline that is probably better than it has any right to be. A 3 out of 5.