The big handset makers will fall divided
If the big handset makers (Samsung, Sony, LG, HTC etc) could get together and promote an alternative open Android, they could probably pull it off.
But committees are difficult and slow, so this will probably never happen.
About the only way this could ever happen is if Microsoft brings back Nokia Android X and really pushes it, but that isn't likely either. I think they are hoping that x86 somehow spreads to the mobile space. It looks more likely that ARM instruction set chips will spread to the laptop desktop space. Why do google's chrome OS laptops run on x86 and not ARM?