Viva Las Vegas!

Viva Las Vegas! is a cut quest in Fallout: New Vegas. Not much is known about the quest as almost entirely blank. The sole exception being four quest stages, one for each major faction, indicating the quest would've been a large quest involving all major factions and having multiple paths.

Behind the Scenes
The name of the quest is a song created by Elvis Presley. Also, the King has clothes named the same.