For most of the past decade, TV producers have been desperate to find ‘the next Game of Thrones’, and now Amazon apparently reckons it’s found it: Lord of the Rings.

The retail giant has reportedly spent an astonishing $250 million to secure the rights to an ongoing TV show set in Middle-earth, with a commitment to multiple seasons and the potential for a spin-off, all to air exclusively on its own Amazon Prime Video streaming platform.

When is the Lord of the Rings TV series coming out?

Right now… uh, we don’t know. It was only announced that Amazon was buying the rights in November 2017, so the final show is probably a long way off still. There’s an outside chance it’ll arrive in late 2019, but realistically it’s more likely to turn up some time in 2020. We’ll keep you posted.

According to The Hollywood Reporter, Amazon's contract requires it to enter production within two years, which makes November 2019 the deadline for production to kick off, adding to the sense that 2020 is likely the earliest it will hit our screens.

Whenever it turns up, it'll be an exclusive to Amazon Prime Video, Amazon's rival to Netflix. You can get Prime Video as one of several benefits from a general Prime subscription, with other perks including free next-day shipping and Prime Music.

Prime normally costs £79 a year, but you can always try it for free through a free trial. There are also rumours that Amazon is in talks to launch a totally free, ad-supported version of Prime Video in the future, but it's all uncertain right now.

What’s the show about?

Again, we don’t know much, but we do know a little. For one, the show “will explore new storylines preceding J.R.R. Tolkien’s The Fellowship of the Ring,” according to Amazon’s statement - but we don’t know if that means between The Hobbit and The Lord of the Rings, or before the both of them.

Amazon apparently "may use material from the films," and there's even a chance that original director Peter Jackson will come on board as an executive producer, so whatever happens it's likely this will exist in the same universe as the film series, rather than rebooting it entirely.

Matt Galsor, a representative for the Tolkien Estate and Trust and HarperCollins also explained that Amazon will “bring to the screen previously unexplored stories based on J.R.R. Tolkien’s original writings,” so we know it will at least partly draw on Tolkien’s writing.

There’s one big unadapted prequel - The Silmarillion - but since it reads more like a history textbook than a novel, it would be tough to adapt into an ongoing show. Still, Amazon could be taking it as a source of loose inspiration.

There are also a number of published books based on Tolkien's notes and unfinished writings, such as The Children of Húrin or the Unfinished Tales compilation. There's yet another on the way in 2018 - The Fall of Gondolin - and anyone keen to figure out what Amazon's show will cover could do worse than reading all these books, as it's almost certain that Amazon will be drawing on one (or more) of them to tell its story.

We do know that Amazon has signed a multi-season deal - so it’s clearly confident about the show - and also has the option for a second spin-off TV series if everything goes well.

Beyond that, the company hasn’t announced anything about showrunners, writers, or stars, so we have no idea who’ll be involved in making the series just yet.