The Branes colliding is not responsible for the big bang, but may
instead have the role in imposing the 2nd law of thermodynamics on
creation or on the big bang.
That is to say the branes that collide are the "brains" of the devil
and God. God created the universe without the 2nd Law of
Thermodynamics, however when the ego of the Devil clashed with God,
the law was imposed on creation.
Also perhaps the picture of what existed before the Big Bang, is that
this space is like Eden, and outside of it is like the rest of the
Creation.
I know the analogies are strained, but just thought I throw them out
there.
Perhaps it is not Adam's sin that leads to the 2nd Law of
Thermodynamics but the sin of the devil.
Also, what lies befopre the Big Bang is merely Heaven before the fall
of devil and his evil angels. Perhaps, Heaven still exists somewhere,
maybe in the center of the Universe and entrance into it is only
through the smallest of doors. As Jesus says "Squeeze through the
narrow door..." Luke 13:23-25 & Matthew 7:12-14. Perhaps this true
both figuratively and literall and physically. That is we can re-
enter Heaven through the same narrow door through which the Universe
came into existence.