One possible fanfic plot could be that Eren has been planning this for a long time. He might gather intelligence about the Colossal Titan's weaknesses. Then, in a fierce battle, he manages to get close enough to deliver a fatal blow. This could be a very emotional moment for him as well, considering the history between them.
Well, for one, the art styles could vary. Maybe the themes explored in each manga are distinct too. Also, the pacing and the way the story unfolds could be different.
Well, sometimes he uses his titan's speed and agility to dodge the Colossal Titan's attacks and then strike at its nape. It's a classic way to take down a titan in the Attack on Titan universe.
The colossal manhwa is remarkable because of its imaginative world-building and unexpected plot twists. It also has detailed illustrations that add to the appeal.
Power and responsibility are common themes. Since Izuku has this colossal form, he has to learn to use it wisely. Another theme could be self - discovery as he figures out what he can do with his new power.
One popular colossal science fiction novel is 'Dune' by Frank Herbert. It has a vast and complex universe with unique political, ecological, and religious systems. Another is 'Foundation' by Isaac Asimov, which presents a grand vision of a galactic empire's rise and fall. And 'Hyperion' by Dan Simmons also stands out. It weaves together multiple storylines in a richly detailed future setting.
I'm not familiar with an 'IRG 1' in relation to DC LSH Colossal Boy. It could be something very specific or a less - known part of the lore. Without more information, it's hard to say what the story would be specifically in that context.
Eren could be an interesting choice. Since he has such a complex character arc already, making him the tenth titan could add another layer to his story. He could struggle with the new power and how it changes his view of the world and his mission.