In this fanfic, the exploration of the world with a god - like Touma could be really fascinating. The balance of power in the A Certain Magical Index universe is very delicate. If Touma becomes a god - like figure, it would disrupt this balance in many ways. The fanfic might explore how the different factions, such as the Magic Side and the Science Side, react to this change. It could also delve into the moral and ethical implications of having such a powerful being in the world, and how Touma himself copes with this new identity and the responsibilities that come with it.
One interesting aspect could be the unique take on Touma's character. Maybe in this fanfic, he has enhanced god - like powers that lead to different story developments. For example, he might be able to solve problems in the Index universe in more extreme ways.
Well, it could be interesting in terms of the new relationships it builds. If Touma is given a god - like status, his interactions with other characters like Index, Mikoto, or Accelerator would change significantly. They might view him with more awe or fear, and this would create new dynamics in their relationships. It could also introduce new characters who are either drawn to or opposed to his newfound power.