Spotted for sale in Asia for Force Friday II (September 1, 2017).
Based on the Star Wars Holiday Special Boba Fett look (although not completely accurate).
From the official Hot Toys post on Facebook:
This Boba Fett Cosbaby features his classic look from the Star Wars Holiday Special animation equipped with blue and yellow Mandolorian armor, a blaster rifle and a jetpack on his back! This little Boba Fett stands about 13cm tall with figure base and comes with bobble-head function as well!
Summer is here! Let the holiday mood begins and don't miss the chance to bring home the Boba Fett (Animation Version) Cosbaby!