As the end of Game of Thrones starts to loom in the distance, HBO is looking at how to stay in the George R.R. Martin game. According to The Hollywood Reporter, the premium cable network is looking into creating four companion shows.

At this point, the planning of the four shows is still in very preliminary stages, so there isn’t much information about what the four different shows will touch on. At this point, there’s speculation that one could be a prequel, one could be a spinoff and one could be a sequel. Again, everything is in the extremely early stages of planning and development, so the four shows could be something completely different.

What is currently known is that, outside of Martin, there’s likely to be four different writers involved in everything. The showrunners of Game of Thrones, Dan Weiss and David Benioff, are also expected to be involved in the four shows, though much of their focus right now is planning the eighth and final of Game of Thrones.

Currently, the four writers that have been tapped are Max Borenstein, Jane Goldman (who will be writing with Martin), Brian Helgeland and Carly Wary, who, similarly to Goldman, will be working with Martin.

Of the four writers, Wary has the most experience in writing for television and has a pre-existing relationship with HBO, having written for The Leftovers, which is currently airing its final season. Some of her other credits include FX’s The Bastard Executioner and AMC’s Mad Men.

Helgeland wrote and directed 42, the biopic about legendary baseball player Jackie Robinson’s life. He’s also took part in 2010’s Robin Hood movie and The Taking of Pelham 123, the 2009 movie starring Denzel Washington and John Travolta.

Goldman wrote the screenplay for Stardust and helped adapt Kick-Ass from comic book to movie form. She’s also been involved in the X-Men franchise (working on both X-Men: First Class and X-Men: Days of Future Past) and the Kingsman franchise, where she worked on both Kingsman: The Secret Service and Kingsman: The Golden Circle.

As for Borenstein, his only TV credits include working on Fox’s short-lived series Minority Report, which was canceled after one shortened season. He’s currently working on Godzilla: King of the Monsters, which will be released in 2019, and Godzilla vs. Kong, which will be released in 2020. He’s also written Kong: Skull Island and Godzilla.

The seventh season of Game of Thrones is set to premiere on July 16.