This hardfork will finally require all witnesses to migrate to the ChainBase implementation.
Do you mean ChainBase will be included in the Nov/16th hardfork? or, is Nov/16th hardfork going to be the final preparation for the ChainBase update which will be planned later on?
I mean that Nov 16th hardfork will only be available with the new chainbase backend. We are not going to back-port the changes to the old architecture.