Titanfall 3 is simultaneously a sad tale of what might have been, and an undying dream of what may one day be. It's widely known that the success of the nominally Titanfall-based battle royale Apex Legends is what ended its planned development, but in an interview with The Burnettwork, former Call of Duty and Titanfall designer Mohammad Alavi said it wasn't EA executives chasing a trend who made the decision to pull the plug—it was the Titanfall 3 dev team.
Respawn worked on Titanfall 3 "in earnest" for about 10 months, Alavi says in the interview, and had a "first playable" build on the go. But the multiplayer team was apparently struggling to address issues from the first two games that Respawn believed kept them from really catching fire.