[Dimensio]

O.K., then you tell what "Origin of the Species" is more closely tied to:
1. The Big-Bang, OR
2. Creationism/Intelligent Design.

It is tied to neither.

- Also, be honest and forthright, do most evolutionist believe in God and Creation/Intelligent design OR in some atheistic world-view?

All surveys show that the majority of those who accept the theory of evolution are theists, not atheists. This is apparent because the percentage of the population that accepts the theory of evolution as valid science is more that twice the percentage of the population that are atheists.

Also, explain why msot evolutionists believe in the Big-Bang or some other atheistic world-view.

Your question assumes that the Big Bang is an "atheistic world-view". It is not, thus your question is meaningless.