Throughout Season 1 of Monarch: Legacy of Monsters, fans have been treated to many Easter eggs to what came before in the MonsterVerse. It makes sense, given that Apple TV+ wants to make the series as connective as possible, without ruining what's to come when Legendary Pictures and Warner Bros. unveil Godzilla x Kong: The New Empire next year.
Source：https://www.cbr.com/monarch-legacy-of-monsters-titan-phone-explained/
