One, and the final, of the twelve Stages found within Injustice 2 is the Fortress of Solitude. This icicle fortress was once what the Batcave was to Batman but in regards to Superman, a safehaven for Superman when need be and a place to plan his next set of actions. The Fortress of Solitude also use to be a main hub for the entire Justice League; that is, until the rise and fall of Superman's regime and all relationships involved became contentious. The Fortress of Solitude also has the access to the Phantom World, a parallel universe that is a prison for any that doesn't belong to such.