Microsoft More First Party Games than ever Before for Years to Come

[Jaywood2010]

Seece said:

Osaka are working on two games and Black Tusk just one

A LinkedIn resume (via VG247) from Black Tusk senior product manager Jonathan Browne reportedly says he's the "primary product manager on four unannounced new IP," and a "key contributor bringing these IP from the very early concept phase through green light to production." The latter part implies that each of them are in active development.