Battle Inspiration:
The inspiration for the idea of the battle (Examples Below):
Michael Jackson VS Elvis Presley:
Both share the beginning of their nicknames "King Of ___", where Michael Jackson is considered the King Of Pop while Elvis Presley is considered the King Of Rock
Master Chief VS Leonidas
Both are soldiers enlisted for an army called "Spartans", and both characters are considered legends in their stories
Steven Spielberg VS Alfred Hitchcock:
Both are famous film directors, later in the battle other famous directors, Quentin Tarantino, Stanly Kubrick and Michael Bay also appear
Gandhi VS Martin Luther King Jr.
Both are famous activists, who both only used non-violent methods for protesting