Parallel universes and alternate realities, in which the decisions of the main characters can result in an infinite number of outcomes, have become increasingly common in modern day film and television. There are several examples of this in the Marvel Universe alone, with films like Spiderman: No Way Home and Doctor Strange: Multiverse of Madness having this concept at their core. The Disney+ series Loki also centers around the Sacred Timeline, and there is a whole host of enforcers who are willing to terminate anyone who threatens to divert from that timeline.