The biggest risk in the coronavirus epidemic in my non-expert opinion is going to be assortment. IF this happens with any of the strains already adapted to infect humans we might really be in trouble...
We already know that Coronaviruses int he wild are capable of recombination...
A good read and somewhat related:
Wong MC, Cregeen SJ, Ajami NJ, Petrosino JF (February 2020). "Evidence of recombination in coronaviruses implicating pangolin origins of nCoV-2019". bioRxiv (preprint). doi:10.1101/2020.02.07.939207.