Our Universe has disproportion between (visible) matter and antimatter. Black holes my contain missed anti-matter. So when black hole will consume all matter of our Universe, it will bang again, without help of any parent Universe.
I said "other 'side'", not 'other side'! (dimensions are silly :) )
However, I'm not a physicist and really have no idea what I'm talking about :( reading about cosmology is only a hobby/daydream of mine.
