An Attack on Titan: What If? series that is basically the Attack on Titan anime but happens in an alternate universe where different things happen instead of how it's supposed to happen like in the original series. An example would be, what if a 60 meter tall Sakura Haruno from the Naruto anime were to completely replace the 60 meter tall Colossal Titan instead, scaling to the exact same size becoming the new "Colossal Sakura Titan"? Basically the titans are replaced by other anime characters.