There's really not much correlation between the events of the big bang and black holes. It had been confirmed that the rate of the Universe's expansion has actually been accelerating, not slowing down since then. It is not known if it will continue to accelerate or if there's an inflection point where it will reach its limit and begin to collapse.
Black holes really should be termed 'neutron stars' because it would clearly define that they are physical spheres of highly-compressed matter. Their gravity is so strong that the escape velocity is faster than the speed of light. That is why EMR's can't escape and nearby objects are pulled in by its colossal gravitational pull.
Many still think they are actual holes in space... how does that make sense?