Some of Big Bang has been proven. Singularity turned into everything.
However, it doesn't make sense of the singularity that came 'outta nothing' (that's why I like the Black hole stuff - I have a Black hole thread

).
Other parts are also incomplete. What we have observed and/or measured about gravitational force appears to be much weaker than what it should be. New theories in conjunction with the Big Bang have been in the works for a long time. A snag happened though, the theories meant to explain gravitational forces within our universe have went multi dimensional!
These theories are complicated, incomplete, and untested - but I love certain aspects of String Theory, and other multi dimensional theories. There are many possibilities that appear to fit with Big Bang, but until we can test some of these possibilities, we won't have any facts to support them.
The collider is suppose to help try to explain some things that are still unknown. Although some out there are afraid of possible disaster playing with forces we don't yet understand.
I like to keep more than 1 door open to what is possible, that way I can be wrong plenty of times, and not be upset

- People that resort to only 1 possible explaination when dealing with unknowns, will never give up that belief, even if it were to be proven wrong!
The only restrictions on what is possible are the boundaries we create within our own mind! There aren't too many absolute facts in our situational experiences. As long as your possibilities don't contradict the constants that we know about, then it is possible.
So sure Big Bang is true, but it isn't enough by itself, and some parts might be wrong, lol.