Don't Wait for a 16-inch MacBook Pro
Apple announced the MacBook Pro 16 in November 2019, and it's unlikely that Apple will release a new model in early 2020.
If you want this larger model, which replaced the 15-inch completely, you should simply purchase one now. We're already seeing a number of 16-inch MacBook Pro deals that offer hundreds in savings depending on the model you want.
It is too early for most buyers to start waiting for the 2020 MacBook Pro 16, even with rumors of mini LED technology.