I believe in a power above all else which gave rise to the universe. You could technically call it "God," but I prefer to think of it just as a primordial force of nature, like gravity and such, but far more ancient.
Basically I believe that in the beginning, there was nothing, and that includes the rule that something can't come from nothing. That didn't exist either, so the void just kinda imploded on itself and now stuff exists.
With no rules or restrictions on what could happen yet, literally anything could happen. In a sense, that would make the void omnipotent, but also probably mindless. In my eyes, less like a god, more like the most powerful force of nature to ever exist. Or I guess not exist.
I don't think it's quite the same thing, unless I've been misunderstanding the concept of the big bang, which is entirely possible. I don't think it describes the state of the universe before the singularity, nor how the singularity got there. This is more or less how I believe that happened. A mindless yet omnipotent force just happened to spawn it into existence.
I mean, we could call gravity or the sun a god. It's really a matter of perspective rather than concrete definition. I've discussed my ideas about the void with people, and there tends to be a pretty even split between people who believe it would be a god, and those who believe it wouldn't count.