Not exactly for me - the multiverse is an accepted fact in my universe. Mirror universe included.

Though it also begs the question as to what kind of universe this is that someone could just summon us all without us even realizing it or even leaving a trail of us getting here. Normally that kind of thing takes a lot of energy and it would leave something for others with sufficient technology to follow.

And, uh, no offense, Intercessor, but I doubt this world has the kind of technology that could mask something so momentous.