I see why this didn't get major production backing. There may be a place for the original hero in medieval times that vanquishes the monsters being female because for some reason the males who normally did that sort of thing were either unavailable or incapable; and there may be a place for a couple of primary male warrior characters being attracted to each other instead of the opposite gender despite that unlikelihood among warrior types; and there may be a place for the queen being black because maybe at some point in the hereditary line of a predominantly white society one of the royals in line for the throne married a black person, and then their child married a black person, and that just continued ever after. And there may be a place for all of that being at the forefront in the first ten minutes of the story. But because one of those on its own would be extremely unlikely and all three together would be a virtual impossibility, it just comes across to a significant portion of society as a writer or group of writers wanting to make a point, and, especially after so many attempts at this sort of ideology from Disney/Pixar and others (that have mostly been box office disappointments to the studios), it's no wonder the big studios backed off this.
And this was even before getting to the Nimona character. After a few minutes, my son, who suggested this movie as our movie night choice, asked if we wanted to continue with it. None of us did because we really weren't interested in another 75 minutes of dealing with a rather annoying primary character. So, we only lasted 15 minutes before we turned it off, and it's too bad because the core story line of a commoner getting the chance to prove his worth and then being framed for a crime to keep him from breaking into "the club" is a worthwhile theme.