Ok here is an idea I've been throwing around I'm going to keep it pretty basic, makes it easier to describe,Supermassive black holes appear at the center of every galaxy, they consume massive amounts of matter, now if each supermassive black hole was a potential big bang I'm sure we would have seen evidence by now,and thy would happen more often. Now take supermassive black holes sharing one singularity, they fill it to critical mass and boom big bang,Keeping in mind this is just an idea I've got no figures or formulas to prove this theory, was just looking for some criticism