Castle Rock on Hulu is jam-packed with characters and events from the Stephen King universe, so what's left for season 3? The show has featured references to everything from The Shining and Rita Hayworth and the Shawshank Redemption in the first season to Misery and 'Salem's Lot in the second. Nevertheless, there's still plenty of source material to explore.

Castle Rock premiered on Hulu on July 25, 2018, with a second season the following year. It features places, characters, and events inspired by the works of Stephen King. Plus, it's overflowing with easter eggs, some overt and others harder and spot, such as the Masten House and Annie Wilkes. It also features many popular actors who have played significant roles in other King adaptations throughout the years. Some of these actors include Bill Skarsgard, Sissy Spacek, and Tim Robbins.

Related: Gerald's Game: All The Stephen King Universe Easter Eggs

Fans of the show have been nervous because Hulu hasn't announced if it will do a third season yet, but a lot of people would like to see the horror anthology series renewed. Following the series' format with a fresh, yet interconnected, story each season, Castle Rock could take inspiration for any number of Stephen King works.

Stephen King Stories That Are Perfect For Castle Rock Season 3

Annie Wilkes in Castle Rock season 2.

Stephen King's multiverse includes a vast library of work to choose from. Some of King's biggest novels set in Castle Rock are The Dead Zone, The Dark Half, and Needful Things. Certain characters from these novels have already made appearances in the show, but some others that could crop up from these works alone are Johnny Smith with his clairvoyant powers from The Dead Zone, the famous writer and recovering alcoholic eerily similar to King himself, Thad Beaumont from The Dark Half, or even the charming and sinister shop proprietor from Needful Things, Leland Gaunt. A more recent addition to King's stories set in Castle Rock is Gwendy's Button Box, which he co-wrote with Richard Chizmar. Introducing Gwendy and the strange box that is given to her would be very interesting.

Even more interesting, however, would be the appearance of the man in black himself, also known by many other names, including Randall Flagg. Flagg is famous for appearing in The Stand after a deadly flu virus wipes out most of the human population, as well as in the Dark Tower series as Roland Deschain's rival. This would bring more of what is perhaps King's most defining work into the series, tying Castle Rock to Midworld. References to the Dark Tower have, after all, already appeared a few times in the series, such as the existence of alternate realities in the multiverse in season 1 and the Masten House from 'Salem's Lot that is directly connected to the Dark Tower series. Many fans would be thrilled to see more of these elements included in Castle Rock season 3.

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