Yeah, big Qn marks still over true governance/openness, Samsung would prolly want to control things too much.
It's hard to say whether it'd be a good thing overall, or a bad one, my personal instinct is the former...
But 1st I'd like to see Sailfish try to get some momentum (no matter how small) on it's own, same for Tizen, which should be -comparatively- easier for Samsung.