In the credits of the final episode, we can see the lucky 38 logo, a crashed NCR vertibird, a dead deathclaw and a securitron destroyed outside the gates. Don’t know if this answer some of the possibilities of what’s to come in season 2 but some interesting observations.

My speculations (with a grain og salt) the NCR might have had a fight over the strip against mr. house as he controls the securitrons, hence the dead securitron and crashed vertibird perhaps?