I tried following Apple's advice on creating a Catalina Beta by cloning my Mojave Beta and then allowing Software Update to upgrade it. The VM cannot boot after the installation reboots it however? Any way to recover this?
If your Mac is Mac Pro or iMac Pro, this KB may help you to recover the VM. VMware Knowledge Base
Now we have Fusion 11.5 released. You can create a new VM for Catalina instead of upgrading a Mojave VM.
Just got back from a trip, and indeed I am on an iMac Pro.
That did not fix my issue in 11.1, but I really appreciate seeing the KB as I now know how to make a multi-socket VM in Fusion. After upgrading the to 11.5 the VM booted normally so 11.5 is really the answer it seems.