[Alberta's Child]

But Darwin's predictions have no relevance for looking forward into the future -- he could not say for certain that any species in the future would even exist, let alone become more complex.

[Junior]

But Darwin's predictions have no relevance for looking forward into the future --

For the sake of argument, let's say that Darwinism makes no predictions about the future of a species, that is not a prerequisite for a theory. A theory need merely make predictions, which Darwinism does, and be testable in that way.

[spqrzilla9]

But Darwin's predictions have no relevance for looking forward into the future -- he could not say for certain that any species in the future would even exist, let alone become more complex.

This claim of yours demonstrates that you don't understand the scientific method at all.