More knowledge of the actual mechanism of gravity would surely help. That we don't seem to know this looks like fundamental hole in the big bang theory, we don't seem to consider the possibility that our atoms themselves could be expanding, like the expansion we see in space.
If that was the case, then we have an explanation for the force of accelereration (gravity) we experience resting on the face of a much larger expanding mass, but the big bang theory would be superseded by something continuous, no beginning, no end.
Gravity waves then would be perturbations in the velocity of the moving surfaces, in a way that creates waves which propagate ahead of the surface of mass generating the wave.
Then maybe there could be a possibility that loss or creation of entire new universes within the same space, coincides with the appearance of gravity waves, and when we measure gravity waves, therefore experiencing them, we are actually switching between alternate universes, and if that was the case, beings who had the ability to somehow not switch, or switch at will, would seem to appear and disappear, to the rest of us, oblivious of this action.
The big bang theory then would appear to be a distraction to those with the power to switch at will.
If they wanted to keep their switching ability secret, the big bang theory is the perfect distraction.
I swear I have something like a fruit-fly with this ability in my kitchen... :)