Board Thread:News and Announcements/@comment-25118285-20180106154859/@comment-27.252.126.229-20180128224731

They have already said that it's mobs with mega in their name. Not gigantism (although creatures with mega in their name probably are large.)

Also, the official F/A twitter posted this: https://twitter.com/fossilsrevival/status/957672328636387328

Only 30 followers to go until the next mob is revealed!