Perhaps. Thing is though that by bring a generic stack of boards, it does not live or die by that one project.
A RPiZ with a mobile data connection but no screen is still a potential IoT platform etc.
Openmoko with its bespoke board lived or died by how well it performed as a phone.
Broadcom, according to the wikipedia page for VideoCore, did however make a couple of Cortex-A9/A7 SoCs that made their way into low end 2012-3 era Android phones.
Perhaps a startup might recycle old Broadcom-based HTC and Samsung models in collaboration with the RPi team.