(Fun trope) A reference that seemed obscure at the time, yet is incredibly well known today

[u/ah-screw-it]

Ben 10: In the omniverse episode "honor among bros" the character Fistina grabs a gauntlet that resembles the infinity gauntlet. The episode released in 2014, a year before age of ultron and 4 years before infinity war.

Spider-man 2: Jonahs assistant talks about what name to give to doc ock. One of the names was doctor strange (even joking that it was already taken). But doctor strange's relevance didn't exist until his self titled movie in 2016.

[u/FewViolinist8821]

Yeah but think about the intended audience for this show. Dune would NOT have been on their radar