I was able to run the following to get an IP back on the management lan.
ifup vmbr0 up
ifconfig vmbr0 192.168.x.x netmask 255.255.255.0
route add default gw 192.168.10.1 vmbr0
Although, vmbr1 doesn't seem to be appearing in my ifconfig list. Even though the bridge appears to be functioning...