Ahead of the official announcement, the next pair of retro Super Minipla kits have been revealed courtesy of @_Erasu: we not only have colored photos of Super Minipla Live Robo(Having been previously been revealed in a blog entry from Bandai awhile back) AND Live Boxer.
Release info for the pair are forthcoming, but at least we know that the pair can combine into Super Liverobo.
UPDATE:
Thanks to a pre-order link from Amazon Japan we now know that Super Minipla Live Robo will cost 4,536 yen and will see a release March 31st 2018.