Many fantasy shows have tried to be the nextGame of Thrones, but one six-season sci-fi series should have been its true successor.Game of Thronesis afantasy show everyone should watch at least once, as it completely changed the genre. It demonstrated that a high fantasy show could be successful with mainstream audiences, and it inspired many networks and streamers to try their hand at similar projects. Sadly, series likeThe Wheel of Time,The Rings of Power,andThe Witcherhave never quite taken off like the HBO hit.

While manyfantasy shows tried to copyGame of Thrones,there’s one sci-fi series that had the potential to be its true replacement. Not only did it have the scope and complexity HBO’s adaptation became known for, but it also came from a lengthy book series with a large and dedicated fan base. And this sci-fi series did earn a lot of praise during its six-season run. However, it didn’t become as recognizable asGame of Thrones, with a few factors contributing to that.

Cas Anvar & Steven Strait in The Expanse Season 3

The Expanse Should Have Been Game Of Thrones' Replacement, Not Another Fantasy Show

The Scope, Politics, & Lengthy Source Material Made It An Ideal Successor

Although a few fantasy shows originally seemed like strong contenders,Prime Videos’The Expansewas probably the most likely candidate to become the “next Game of Thrones.“Based on the book series of the same name, written by author duo James S.A. Corey,The Expansehad a lot going for it. Spanning nine books in total, the source material accumulated a committed fan base, making it nearly as culturally relevant in the sci-fi sphere. This also ensured it had plenty of source material to work with (thoughThe Expanseshow didn’t end up adaptingall the books).

The Expanseboasted a complex world and political themes that were perfect for those who enjoyedGame of Thrones.

Game of Thrones Poster

In addition to coming from similarly long and popular source material,The Expanseboasted a complex world and political themes that were perfect for those who enjoyedGame of Thrones.Though less gruesome and explicit, even the sci-fi show’s realistic approach to its storytelling was reminiscent of the HBO series' take on its fantasy setting. Despite the major differences between the two series — their genres setting them apart instantly — they had a lot in common. HadThe Expansemanaged to gain the same traction as the fantasy series, it might have been considered its successor.

Why The Expanse Never Reached The Heights Of HBO’s Fantasy Series

It Lacked A Few Things That Helped Game Of Thrones

WhileThe Expansehad the potential to beGame of Thrones' true successor, it never reached the heights of HBO’s fantasy series — at least not in terms of wide-scale success. Its impressive 95%Rotten Tomatoesscore speaks to its quality, as well as the fact that it was critically acclaimed throughout its run. Butit never became the driver of water cooler discussions in the same wayGame of Thronesdid, and that could be chalked up to a few things.

For one, sci-fi has seen a huge resurgence in recent years — one only needs to look atApple TV+’s approach to the genreto see that — butthe category wasn’t as big whenThe Expansedebuted back in 2015. WhileStar Trekhas maintained its cult following, and some other sci-fi series managed to grow, the genre mostly appealed to a more niche audience. That was true of fantasy beforeGame of Thrones,too, butThe Expansedidn’t draw viewers who weren’t otherwise interested in sci-fi, while the HBO show hooked newcomers.

Additionally,The Expansestarted on Syfy and then moved to Prime Video, and this may have prevented it from reaching a larger audience. HBO has brand recognition and fewer restrictions when it comes to budget. Viewers expect quality content from the network, regardless of genre. But Syfy caters more to the audience that’s already watching sci-fi shows,making newcomers less likely to tune in. And Prime Video was a smaller streaming service at the time, and it hadn’t adopted weekly release models whenThe Expansefirst moved. All these details meant its earlier seasons didn’t stay front of mind.