As of now, it may be possible to create such report using custom tables, as you can create a table for hosts and specify modification rules using regular expressions to detect IPv4 and IPv6 addresses such way. You can create such table in Options > Report > Tables if you use the Professional or Enterprise edition.
Here is an option that will allow you to keep DNS lookup turned on.. This version detects IPv6 addresses instead of ipv4 like the above suggestion.
^(?:[A-F0-9]{1,4}:){7}[A-F0-9]{1,4}$~= IPv6
^(?:[A-F0-9]{1,4}:){7}[A-F0-9]{1,4}$!~= IPv4