If Mr. House does show up in 2296 when Season 2 is set then that would seem to settle the fan debate over which ending of Fallout: New Vegas is canon. In the game, a victory for Mr. House is one where he survives the Battle of Hoover Dam, pushes out the other factions, and remains in control of Vegas.

The 'Fallout' Season 2 trailer reveals that Justin Theroux is Robert House, plus there's a deathclaw in New Vegas.

The second season releases its premiere on December 17th with weekly episodes to follow up until February 4th. “The new season will pick up in the aftermath of Season One’s epic finale and take audiences along for a journey through the wasteland of the Mojave to the post-apocalyptic city of New Vegas,” the show’s description reads.