Respawn Entertainment's unannounced game appears to be a third person action/adventure title.
A job listing for a senior level designer posted on Gamasutra, via Game Informer, reads:
"We are now recruiting designers for two game development projects – a new game in the Titanfall universe as well as a new 3rd person action/adventure IP. Respawn is seeking a Senior Level Designer to embrace and contribute to the project vision, breathing life into the gameplay world and helping define the moment to moment player experience."
Respawn is also searching for a VFX artist, a senior systems designer, and software engineers.
It's been known since the studio's inception that a second team was intended to create the unannounced game alongside the one developing Titanfall 2. This is the first time we've really had details about what to expect from it, however.
During the summer of 2014 Respawn hired Stig Asmussen, who directed God of War 3 at Sony Santa Monica. He is likely overseeing this project.