The screen shows life becoming sparse on the planet. Many, but not all, of the animal creatures begin to shrink in size. The total number of kinds of things decreases. The plot slows down. Living creatures inhabit fewer roles, and the roles change less and less as the tape proceeds.
Life steadily collapses in scope and size until it becomes small, bland, and naked to the elements.
In a very boring ending, the last variety of animated things disappear as they melt into a single tiny amorphous blob. Life surely has a direction of time, but beyond that, neodarwinists would argue, nothing is sure. Since there are no directional trends in organic evolution, nothing about life's future can be forecast. Therefore the unpredictable nature of evolution is one of the few predictions we can make about it. Neodarwinists count on evolution being unpredictable.