Dimensional refers to different time and space. In anime jargon, 2D usually refers to a fictional two-dimensional world created by Japanese manga and animation media. The three-dimensional world refers to the real world, which is the time and space we are in. This term is often used to describe the characters and plots in anime, manga, games, and other media works. It means that these characters and plots only exist in the fictional world and not the real world we live in.
In some Avengers fanfictions, Aunt May might die from an attack by a supervillain. For example, if the villains target Spider - Man's loved ones to get to him, Aunt May could be in the crossfire. Maybe a group like the Sinister Six raids Peter Parker's home, and in the chaos, Aunt May is fatally injured.
Aunt May's death in the original comics was often due to various storylines and circumstances, but the specific cause could vary depending on the particular comic run.
In anime, there were also other dimensions such as:
1. Hyperdimension: Also known as hyperreality dimension or parallel universe, it is a fictional concept in anime that represents the existence of a world beyond the real world that may exist in a world different from the real world.
Fantasy Dimension: A common concept in anime. It represents a fictional world and mythological stories, usually related to magic, mythology, and mysticism.
3. Future Dimension: A possibility of a future world, usually related to technology, the future, and science fiction.
Dream Dimension: It is one of the common concepts in anime. It represents the human subconscious and dream world. It is usually related to psychology, fantasy, and mysticism.
These dimensions were all common fictional concepts in anime, representing different topics and storylines.