Tombstone and Wyatt Earp were two competing productions about the legendary lawman, and there is a rumor claiming Kurt Russell offered Kevin Costner a cameo in his film. Every so often in Hollywood, there will be two blockbusters that arrive in the same year with the same basic concept. 1998 had Deep Impact vs Armageddon, while 2013 saw Olympus Has Fallen battle it out with White House Down. While Tombstone and Wyatt Earp didn’t released in the same year, they were competing for the same audience.
https://screenrant.com/tombstone-movie-kurt-russell-kevin-costner-cameo-rivalry-rejected/