Just to clarify, ToE has been so well verified over the past century and a half that I doubt that any
single discovery could over turn it. Any single anomalie (and I suspect that a few do exist now) would either be given an ad hoc explanation, or people would just admit "I don't know". What we would need is
patterns of consistent anomalies.
One set of human remains from the Precambian would not falsify evolution; we would need to see, over and over again, many, many remains, of many, many modern animals from preCambrian rock.
But I would say that Yahweh has already had a chance to falsify evolution, but he has blown it. We could see the fossils of all species mixed up in all the strata - we don't. We could see radiometric dating give mixed up ages for various strata - we don't. We could look into the sky and see only the stars that are 6000 light years away, and looking at 2000 year old star charts see that they only say stars 4000 light years away - this is not observed. We could see that every organism used a different genetic code - we don't. The only major falsifications I can think of are the ones that have already been checked for.