As Greg pointed out, if you have a secondary PAN, or a second node that had the PAN persona enabled on it prior to this deletion event, then you can promote it to primary.
I've never tried this but the data is on the VMDK.
Since you still have the VMDK though you should be able to restore this node on the VMware side. If the guide above doesn't work then you can also try rebuild the VM as a new VM in vcenter/vsphere the same as you had it before it was deleted. Then map the original vmdk as the only hard drive, boot from it. You could also deploy the ISE OVA again, delete and replace the vmdk/hdd with your original pan node vmdk. Start with the VMware KB above.