The race to become "The Next Game of Thrones" is a crowded field indeed, and the biggest contenders all seem to be... Game of Thrones itself. We already know that HBO ordered scripts for five potential prequel series, and we already know that one of those prequels has the working title of Bloodmoon and will depict the original Long Night, thousands of years before the events of GoT. Now, we've learned about another spin-off: HBO is ordering a pilot for a House Targaryen prequel series.
For those who have lived decent enough lives to not be in the know about ASOIAF/GoT, the Targaryens are one of the central families of the series. They are known for two things: 1) riding dragons and 2) conquering Westeros. House Targaryen ruled the Seven Kingdoms of Westeros for about 300 years before the start of the show, so there's no shortage of stories and larger-than-life characters that can be turned into a series. There's so much Targaryen content that George R.R. Martin published a 700-page Targaryen history and it was only the first half of a projected two-volume book. (Speaking of, what's the over/under on us getting Fire & Blood Volume II on top of the remaining two A Song of Ice and Fire books?)
We don't know exactly what this Targaryen prequel will be about, but Deadline's scoop alludes to the Dance of the Dragons, aka the Targaryen civil war that drove the dragons to extinction. I have some reservations about that storyline. Focusing on Westeros during another period of civil war makes it a little too derivative of Game of Thrones for my taste, and if the hook of this new show is the dragons, I don't see why we should jump into a story where all the dragons die very rapidly and brutally. Then again, it seems like this new show will "lead up" to The Dance, so we maybe should think of the war as final season material. In that case, a family drama during the reign of King Viserys I Targaryen could be pretty cool. Personally, I'd prefer a The Crown-style biographical drama about King Jaehaerys I Targaryen, "the Old King."
Game of Thrones: The Last Dragons* has so far only been ordered to pilot, and we have no idea when said pilot is being filmed. (Sidenote: Bloodmoon's pilot wrapped this summer, and we still don't know if that's been ordered to series.) George R.R. Martin is attached as an executive producer and Ryan Condol wrote the script, so if you felt burned by Benioff and Weiss' Game of Thrones conclusion, you don't immediately need to write this new show off. Unless you dislike prequels on principle, then in that case you might want to write this one off.
* not the actual title, but who knows, sucka!