BioWare, but it might interest you to know that the Canadian RPG giant wasn't married to the Star Wars IP when it began discussing its initial foray into the MMO space. According to an article at PC Gamer, everything from the Lord of the Rings, to the Dark Tower, to A Song of Ice and Fire was on the table when the team began drawing up its design documents.
"If we were going to do a Game of Thrones MMO, what kind of rules and what kind of gameplay elements would really bring that world to life? Each [design document] had that, but we always focused on the story at the fore," says BioWare's James Ohlen.
Ultimately, the devs forsook Westeros for the fertile setting they helped create in the Knights of the Old Republic series, and George R. R. Martin fans are left to ponder the differences between a huge BioWare production and a Bigpoint browser title.