Also there are great number of possibilities that even the smartest persons could not even imagine, but powerful Superintelligence could.

I think that, if you want to discuss the notion of the Superintelligent in any kind of a rational way, it is useful to make a distinction between "the Superintelligent can do things we can't", and "the Superintelligence is literally omnipotent". If the latter is true, then any meaningful discussion of it is impossible -- for the same set of reasons that meaningful discussion of the omni-everything Christian god is impossible.