Hello:
The cyclic nature of the universe may be at a galactic level.
The growth of a galaxy is determined by its size and the size of its nearest neighbors. The Milky Way galaxy that we reside in it seems is of the larger variety, and is presently in the process of gobbling up at least 2 other smaller galaxies as we communicate right now. This process of galaxy gobbling is likely to be the only way that mankind will ever visit another galactic star system. As this process continues it would seem that the number of galaxies must decrease in number and increase in size. I am sure that this will leave large spaces between the final extremely large galaxies. Should the black holes at the center of these extremely large galaxies collide or fall into an orbit about one another what might the result of this be. Considering that 2 orbiting black holes will continue to increase in mass as they continue to gobble all mass in the space around them. What might be the result of this phenomena.
The following link is about the 2 smaller galaxies that our milky way galaxy is in the process of gobbling now.
http://spaceflightnow.com/news/n0311/04canismajor/
John.