Io was the original title of Outland (1981) but at that time testing showed people read the name Io as 10, and so the name was changed.
This movie features a quote from The Iliad, by Homer, who also wrote The Odyssey. 2001: A Space Odyssey also involves a mission to Io.
While there are very few characters in this movie, two have been in Marvel movies: Danny Huston portrayed Colonel William Stryker in X-Men Origins: Wolverine (2009) and Anthony Mackie plays Sam Wilson (aka: Falcon) in the Avengers franchise.
Micah recites an excerpt from The Symposium about how people search for their other halves and attributes it to Plato. The essay was actually written by Aristophanes.