Initially conceived as an R-rated Star Wars movie, after being turned down by Disney/LucasFilm, Snyder said "screw you guys, I'll make my own Star Wars, with blackjack and hookers" (hence the R rating), and that's where things got really weird.
Diving deep into the same pulpy roots of Lucas' original Star Wars, and mashing them all together into one giant anachronistic stew of disparate characters and genres, with the same "team of ragtag band of warriors with different backgrounds come together to defeat the Evil Empire" line we all know and love.
It's also why the trailer looks like several different movies and shows in an oversized trenchcoat.
Yes there's bare-chested barbarians and gryphons.
Giant spider women.
Light sabers.
Space Nazis.
Ming the Merciless.
Gladiatorial combat.
A guy in a 50s style three piece suit.
Arthurian myth.
Cowboys.
Aliens.
Alien cowboys.
Monks.
Monkeys.
Prophecies.
Spaceships.
WW2 ground troops.
Spears.
Lasers.
Swords and sorcery.
IN SPACE.
Now some may say "I liked this movie more when it was called "Battle Beyond The Stars" and they may be right. A healthy dose of camp helps the pulp go down. I'm not saying it can't be pulled off completely straight, but I am saying Snyder is not the man to do it. While visually impressive, his movies are, quite frankly, ass.
So. R-rated edgy Star Wars fanfic with a huge budget and nice visuals.
Will it be good?
Probably not.