For WOW and FFXIV:

- An expansion that deals with cosmic threat and concludes a multi-expansion saga, has us flying in a spaceship into another planet/dimension at the end.
- An expansion before that dealing with an alternative timeline that has a bait-and-switch moment where the good guys almost won, but then Emet betrays you/Gul'dan subdues the Iron Horde and there is another mini-arc after that
- An expansion themed around Asia and focused on a war without an obvious large-scale threat(not front and center at least, both have one in the background)
- An expansion focused on dragons with a furious seething dragon as its primary antagonist(also bonus points for the similarities between shattering/7th calamity)

Is it poetry rhyming or "borrowing" concepts?
Is Gaius the Lich King?
Are we heading into FFXIV's BfA?

Hell if I know, but the parallels are fun.