Reports on the fate of LEGO BrickHeadz in 2019 have varied, with conflicting information coming from usually reliable sources. Whether or not the regular, licensed theme continues, exclusive seasonal sets will continue at shop.LEGO.com.
Brickset has shared images of the six sets that will be released next year:
40348 Birthday Clown
40354 Dragon Dance Guy
40353 Reindeer, Elf and Elfie
Four of these six holidays had LEGO BrickHeadz sets in 2018, yet the LEGO Group has managed to find new ways to repeat previous seasons. Clearly 40348 Birthday Clown is going to be available all year, as everyone will want the set at a different time. 40354 Dragon Dance Guy will take a slot for the Lunar New Year, which seems to replace Thanksgiving, which had a slot in 2018. This may not be exhaustive, other seasonal sets may pop up during 2019.
Brick Fanatics recently picked out ten Disney characters who would be perfect for the LEGO BrickHeadz theme.