We'll that's about it for Moto then
They have Windows Mobile, Symbian MotoMAGX (aka Linux Java) and P2K.
Windows mobile is fine but expensive and needs a fast phone.
P2K is so old and broken it is unusable
Linux has spent the last four years being a year from being ready and still is with no timescale for an open version. What they have is memory hungry and slow.
Symbian is the only expandable, mid-range OS they have.
How keen do you think an ex-Qualcomm person will be to an OS owned by Nokia?
They should have given the $70m package (it is that much) to Ryan Block off Engadget.