I think I found the best answer - 

The original owner died before 1/1/2020; then the original beneficiary died on or after 1/1/2020. In this scenario, the successor beneficiary is required to continue taking annual RMDs based on the same calculation that the original beneficiary was using. In addition, the 10-year rule will start to apply as well. So, the successor beneficiary must take annual RMDs and must withdraw the entire balance of the retirement account within 10 years after inheriting the account.

There will be a new inherited IRA opened for the successor beneficiary, but RMDs will be based off of the original beneficiary's DOB, and the account will have to be depleted within 10 years.