Alvin and the Chipmunks come to mind. Pure 80s show right around the time where it was already thick with lots of other cartoons of it’s time and just happened to be one of the popular ones. Ended in 1990, pretty much saying that it knew the 80s was over. Released a CGI film in 2007 that somehow spanned over 4 movies. All of which, while numerically looking good at the box office, was really criticized because it was one of those film series jerked out from the era it was in and fucked over.
The grandfather paradox.
But also, even Tolkien borrowed from those before him, thats the nature of art. Hell its the nature of everything. You build on the shoulders of those before you. Beowulf for example.
The prophecy of the witch king is inspired by Macbeth. The ent attack from birnam woods.
A lot of the book is influenced by the first world war, like mordor.
Also borrows from Christianity and the classical era. Feanor from Prometheus, Turin from Oedipus, beren and luthien from Orpheus and Eurydice.
I could make a million comparisons. Perhaps we wouldn’t end up in the world we’re in. Or perhaps all that was layed before him had already allowed a pathway to where we are now. He was just the incredible vessel.