"House of Dragons" is coming to HBO!
And I think it's a terrible idea!
https://www.hollywoodreporter.com/live-feed/game-thrones-prequel-house-dragon-gets-hbo-series-order-1250974
Yes, the series has been ordered, and will be made. I love "GoT" passionately (or 7/8ths of it, anyway), and am not thrilled.
IMHO the events of the Targaryan Conquest are too close to the events of "GoT", everything that happens is going to see trivial compared to the extinction-level threat that's coming up in a few generations. Plus the whole thing is mapped out in GRRM's history-of-Westeros book "Fire and Blood", and the book is entertaining enough, but it didn't make the events of that time sound exciting. And like any geek, I will be OUTRAGED if they don't stick to the canonical events of the book.