Best: Ragnarok actually feels like a standalone movie

Again, Thor: Ragnarok was full of Easter eggs and references. Unlike other movies (for example, Avengers: Age of Ultron), it didn't crash under the weight of the shared universe it was a part of.

For instance, Hela had no problem dismissing the artifacts from Odin's Vault. Specifically, we’re referring to the universe’s second Infinity Gauntlet, which has raised numerous questions. Hela simply shrugged it off and dismissed it as fake. It was a blink-and-you'll-miss-it scene, but  it did clear up some confusion.

Another example is how Thor: Ragnarok set the Infinity War and how Asgard’s destruction opened the door for Thanos. Basically, we learned that Earth's heroes will stand alone. But again, Asgard's destruction came as naturally as possible, and it fit the movie's plot.

Of course, the mid-credits scene revealed Sanctuary II, but that’s why it’s a credits' scene. It might be a cliffhanger, but it might as well have been completely cut from the film.