Titanfall, Titanfall 2, and Apex Legends share a universe, but have been kept pretty separate for the two years since Apex Legends first released. On a recent panel featuring a few Respawn devs hosted by BrownGirlGamerCode, Apex Legends' Senior Writer Ashley Reed noted that the games are connected very closely.
"What's going on in Titanfall is a war," said Reed, "Apex is what happens after the war." Reed then said that Respawn wanted to integrate the worlds first built in Titanfall more thoroughly into Apex.
The follow up comment by another developer was much more explicit, though.
"Next season, Season 9, you're actually going to see a ton of Titanfall coming back into the game in one way or another. So, I've told some people before, if you're a Titanfall fan hang on for Season 9," said Apex Legends Game Director Chad Grenier during the same panel.
That said, there are no plans to actually add Titans proper, say Respawn, reiterating their statements from over the years.
That comment makes it feel much more like those leaks from a while back are more plausible, the ones about upcoming character Blisk, who can call in a computer-controlled Titan as a kind of turret. Blisk is a Titanfall character, a vicious mercenary who also serves as chairman of Apex Legends' Apex Games.