No, I think we will receive the alien signal okay...because I am betting on another paradigm shift, this time to take us outside of our bias for perceiving our universe ONLY within the narrow boxes of time and space.
So I was going to say all the rules will blow up, but no it's more that we will come to understand how tiny is our segment of reality where we are locked into the rules of time-space, and how vast our human horizons.
* * *
Think John Stewart Bell (with whom I am in love), Bell's Theorem, quantum entanglement and the failure of local realism.
Is the moon still 'there,' even when Albert Einstein is not looking at it? ...our confinement within the ideations of here & there, then & now, is compelling but unnecessary.
An' he had a sense of humour too...