Can you be more specific? All I'm finding is they made the ODROID-W using a specific Broadcom SoC, and Broadcom refused to supply them with it, so Hardkernel had to stop making the ODROID-W after their first production run.

That seems to say that theres not a technical issue with making an rpi-compatible SBC but a political one.

The best I can find is https://www.raspberrypi.org/forums/viewtopic.php?f=62&t=8564..., which is pretty funny but not very informative.

That's for an external party. Wouldn't the Pi foundation have a better idea of how to do it?