That episode where they find the lab with failed experiments in big vats and find out the Empire is trying to extract Midiclorians and use them in experiments -- that stuff is likely hinting at how Palpatine was revived or how Snoke was created.

Also, there are various hints about The First Order (which the Empire rebrands itself as in the sequels). Like, when that dude who planted a tracker in Mando ships calls in, that Empire officer tells him "you'll be well rewarded in the new era. Or that chick in the last episode that used to create warships for the Empire, Mando says "seems like she's still in business" and she is, she's very likely building ships for the new Empire.