Confirmed early in a catalog released in early August 2017.
Coming January 2018. Spotted in one store in December 2017.
From the LEGO website:
Bring in the bounty with this buildable and highly posable LEGO Star Wars Boba Fett figure. The battle-scarred armor decoration with textile cape and helmet with lowering antenna/aiming device add a real feel of authenticity to this popular character from the Star Wars universe. Boba Fett is also armed with a blaster rifle with spring-loaded shooter and jet pack with integrated flick missile -- the perfect accessories for tracking down bounties!
* Buildable and highly posable Boba Fett figure features a cool color scheme with battle-scarred armor decoration, blaster rifle with spring-loaded shooter, jet pack with flick missile and a movable helmet antenna/aiming device.
* Features new-for-January-2018 Star Wars: Return of the Jedi helmet, textile cape and color scheme.
* Extra ammo included.
* Play out exciting shootouts with the powerful spring-loaded shooter and flick missile.
* Move the limbs into any battle pose.
* Sturdy and durable design for intense action play.
* Play out epic adventures from the Star Wars: Return of the Jedi saga.
* This buildable figure is suitable for ages 7-14.
* Stands over 9" (25cm) tall with antenna extended.