To clarify, while Broadcom is a key partner for the Raspberry Pi Foundation, they don't own all the key silicon that makes it onto Raspberry Pis. For example, the "RP1" chip that is effectively a Southbridge on the Pi 5 was designed by and owned by the Raspberry Pi foundation/company, and the same is true of the chips used on Pi Pico boards. I wouldn't expect a new Pi to use all their own chips, but in theory it's possible.