Sui Ishida gave Pierrot a story draft for an alternative ending to Tokyo Ghoul. Pierrot barely looked into it as it had come either too late into production or something along those lines.Didnt Tokyo Ghoul author hate the original adaption, which confused me why Re used Pierrot
I’m guessing Pierrot got it because they still held the licence to the overall franchise. Hopefully it lapses eventually so another studio can take a crack at it.