According to an interview with Respawn done by Gamerreactor, Titanfall 2 will not be included in EA or Origin Access. This means no trials, no discount on the game, and no early access to the game.
According to Gamereactor, Respawn has no intentions of adding Titanfall 2 to the program at launch. This does not mean it will never appear on the program, but for the time being you’ll have to wait until the game is released to play it.
Titanfall 2 is set for release October 28th for Xbox One, PC, and for the first time in the series PS4.