i would assume that, upon any expression of albertan sovereignty, they would be expected to assume the role of the crown. it would not be fundamentally different than patriation, which would be the precedent. however, it's worth noting that some indigenous groups have never accepted patriation and consider their agreement to strictly be with the british crown, and not with ottawa.
this would have no effect in quebec, because quebec was not added to canada by treaty but by conquest. there are no underlying treaties for quebec, except with the inuit in the very far north, in the parts of quebec that were in the hudson's bay company (rupert's land) at the time of conquest.