There are a few on the horizon that look quite promising.
Pantheon: Rise of the Fallen if you like old-school MMOs like Everquest.
Ashes of Creation is probably one of the most hyped ones at the moment. Alpha is coming in June.
Camelot: Unchained from some of the people behind Dark Age of Camelot.
Expansions for The Elder Scrolls Online and Final Fantasy XIV are also dropping this year, along with The Burning Crusade for WoW Classic. I'll probably give all of these a go so let me know if you want to group up 😀