"Although strong emergence is logically possible, it is uncomfortably like magic. How does an irreducible but supervenient downward causal power arise, since by definition it cannot be due to the aggregation of the micro-level potentialities? Such causal powers would be quite unlike anything within our scientific ken. This not only indicates how they will discomfort reasonable forms of materialism. Their mysteriousness will only heighten the traditional worry that emergence entails illegitimately getting something from nothing."-- Bedau 1997 Via Wiki
If we can get a universe from Nothing, we should be able to get emergent properties from the same source.
After all, which is more improbable, a universe from Nothing, or a mere emergence of properties from within this universe? Getting something from nothing is not an anomaly of science, it is the very foundation of Big-Bang science.