In early 2015, Vince Zampella confirmed the existence of Titanfall 2 & that the game would be released on multiple platforms. While the original game hit just the Xbox One & PC, fans on the Playstation 4 can definitely expect the game to arrive there as well. What about the Nintendo NX though? That's something we still don't know, because we don't know anything about the Nintendo's new system yet. Here's the official quote from Zampella: I'm really happy to see the game arriving to more than just the Xbox One & PC though. It's a game that everyone should definitely experience, so having the sequel on multiple platforms is the way to go.
I agree. The more people who gain access, the more revenue Respawn make. The more revenue they haul on, the more chance Titanfall 3 becomes a reality in the future.
I sincerely doubt they'll release anything on Nintendo's new console. Nintendo isn't really looking to head down the FPS aisle.