He predicted them I think, I'm not sure if they were discovered while he was alive, but they suppressed his cycling universe paper in English until five years ago. Black holes are what happens when the stars burn out, general relativity says all forms of energy have gravity, and there's no reason to think dark energy, the unknown, isn't like all other forms of energy. This would add to the gravity of the black holes, while removing all propulsion, causing the big crunch. The reason it was suppressed was because the people who came up with the big bang theory were fundamentalist Christians who took as proof of the literal truth of Genesis, which was supported by the majority of scientists.
February 19, 2014
Springer Science+Business Media
Researchers have provided the first English translation and an analysis of one of Albert Einstein's little-known papers, "On the cosmological problem of the general theory of relativity." Published in 1931, it features a forgotten model of the universe, while refuting Einstein's own earlier static model of 1917. In this paper, Einstein introduces a cosmic model in which the universe undergoes an expansion followed by a contraction. This interpretation contrasts with the monotonically expanding universe of the widely known Einstein-de Sitter model of 1932.