It was inevitable, as even Chromie succumbed to the Infinite in one of the timelines, and the patch 10.1.5: Fractures in Time patch press kit show us just what evil Chromie, aka Morchie, looks like! She’ll be showing up in the megadungeon, which will see players face off against the Infinite Dragonflight, with Galakrond and Iridikron being the big bosses in the aptly named Dawn of the Infinite. However, she may also be part of the story outside the dungeon as well, as all we have to go on are the press kit images, and they don’t specify is she’s only in the megadungeon.
You can read more about patch 10.1.5 here.
And here’s a direct comparison.