Ninja Batman is a stunning anime-film made by Kamikaze Douga studio. Technically, it's their debut because prior to that they only made some short animations and music videos. Kamikaze Douga's banner is to make animation aimed primarily at people that love anime and not the ones that are influenced by Western culture.
Kamikaze Douga took the principle of "When in Rome, do as Romans" and created Ninja Batman.
Now, the reason why I recommend Ninja Batman to people who like Jojo is because these two share the same level of bizarre over-the-top action fueled by the brilliant soundtrack and stylized visuals. Very much like Jojo, Ninja Batman takes some foreign ideas (Batman, in this case) and adapts them in the way they see fit.
As a result, Batman's little trip to Japan is a non-stop express through all that makes Japan the country that we love.
Also I'd like to note that some staff from Kamikaze Douga has worked on first 2 openings of Jojo!