War of the Worlds '15 featured eight professional wrestling matches that involved different wrestlers from pre-existing scripted feuds and storylines. Wrestlers portrayed villains, heroes, or less distinguishable characters in the scripted events that built tension and culminated in a wrestling match or series of matches.
Jamin Pugh
Mark Pugh
Shinsuke Nakamura
Kazuchika Okada
Allen Jones
Austin Jenkins
Robert Anthony Fish
Kyle Greenwood
Hiroshi Tanahashi
Keiichi Yamada
Aaron Frobel
Tetsuya Naito
Daniel Covell
Frank Gerdelman
Matthew Massie
Nicholas Massie
Michael Bennett
Matthew Marinelli
Jamar Shipman
Takaaki Watanabe
Yujiro Kushida
Christopher Lindsey
Keiji Takayama
William Hunter Johnston