1. Hajime Isayama, the creator of the popular anime series "Attack on Titan," had an original plan to make the Titans fight each other using mixed martial arts. According to the article, this idea was scrapped in favor of the more well-known narrative where Titans are depicted as mindless, monstrous creatures that attack and devour humans.

2. The article suggests that Isayama's original concept for the Titans was to have them engage in a more dynamic and interactive combat style, with the Titans using various martial arts techniques to fight against each other. This would have created a more complex and engaging narrative for the series, rather than the straightforward "humans vs. Titans" dynamic that was ultimately chosen.

3. The article also mentions that Isayama's decision to abandon the mixed martial arts concept for the Titans was likely influenced by the need to create a more accessible and mainstream storyline that would appeal to a wider audience. The final version of "Attack on Titan" has gone on to become a global phenomenon, with its unique blend of action, drama, and social commentary.