In the Arrowverse, what is the Pre-Crisis Saga, Crisis Saga and Post-Crisis Saga?

The Pre-Crisis Saga in the Arrowverse refers to the events and storylines that occurred before the Crisis on Infinite Earths crossover event. This includes shows like Arrow, The Flash, and Legends of Tomorrow, as well as Supergirl (which was originally a separate universe before merging with the other shows).

The Crisis Saga refers specifically to the crossover event known as Crisis on Infinite Earths, which occurred in 2019 across multiple episodes of the Arrowverse shows. This event involved the merging of various parallel universes into a single "Earth" and resulted in major changes to the Arrowverse continuity.

The Post-Crisis Saga refers to the storylines and events that occurred after the Crisis on Infinite Earths crossover. This includes Arrow's final season, as well as ongoing seasons of The Flash, Supergirl, and Legends of Tomorrow. The Post-Crisis Saga is set in a new continuity that resulted from the events of the Crisis, with characters and storylines potentially different from those in the Pre-Crisis Saga.

In the Arrowverse, the Pre-Crisis Saga, Crisis Saga, and Post-Crisis Saga refer to different story arcs that revolve around the major crossover events known as the Crisis on Infinite Earths.

1. Pre-Crisis Saga: This refers to the storylines that precede the Crisis on Infinite Earths event. It includes the individual seasons of various shows in the Arrowverse, such as Arrow, The Flash, Supergirl, and Legends of Tomorrow, among others. During this saga, each show focuses on its own set of characters and storylines, although occasional crossovers occur between the different shows.

2. Crisis Saga: The Crisis on Infinite Earths crossover event is a major storyline that spans multiple episodes and brings together characters from various Earths in the multiverse. It centers around the threat of the Anti-Monitor, who seeks to destroy all existing Earths. Heroes from different Earths, including the Green Arrow, The Flash, Supergirl, Black Lightning, and others, come together to save the multiverse. The Crisis Saga serves as a culmination of the Pre-Crisis Saga and leads to significant changes in the Arrowverse.

3. Post-Crisis Saga: This refers to the storylines that follow the Crisis on Infinite Earths event. After the crisis, the multiverse is consolidated into a single Earth, known as Earth-Prime. The Post-Crisis Saga explores the consequences of the crisis and the new status quo established after it. It allows for greater crossover potential between characters and shows within the Arrowverse, as they now all exist on the same Earth.

It's worth mentioning that the Arrowverse is an interconnected universe of shows, and these sagas help provide structure to the overall storyline and continuity of the various shows within it.