with regards to the black hole big bang, first of all you need massive super giant collapsed stars to form a black hole when that star dies, i can see the reason behind the second third and umpteenth times the big bang may have occured, but not the very first one, as just where did the matter to produce the stars come from in the first instance to produce the black holes. that's for just the black hole big bang. but then the question remains just where did the matter come from to start our big bang?