Here's what happened: director Otto Bathurst (who may or may not have directed anything before) watched Rocky, 300, a Baz Luhrmann movie,Ferris Bueller's Day Off, Gladiator, Batman, Kingsman, The Lord of the Rings, and at least one of those Mortal Kombat movies, got really, really drunk, and fell into a stupor. The dream he had while in this state was the blueprint for Robin Hood. The film takes elements from a host of other, better films and puts them together in a silly, disjointed fashion, leaving the viewer scratching his head about what is going on. The audience is told explicitly at the beginning to ignore the stupid, anachronistic setting and just go with it. If you do that, you'll only be slightly less confused and disappointed than you would have been otherwise.
Taran Egerton reprises his role as Eggsy, only this time without the fun. Joining him is Jamie Foxx, chewing up scenery as a larger and angrier version of Achoo from the Mel Brooks Classic "Men in Tights." Together they hatch a plot to defeat the evil Sherriff of Nottingham played by a guy desperately trying to be Alan Rickman, and his diabolical pseudocatholic allies by running around in costumes stolen from a Mortal Kombat movie and committing armed robbery with specially made rapid-fire bows. Their brave criminal activity inspires the townfolk to rise up and don masks of their own. Since there aren't enough scenes taken from other movies, Bathurst ends the film by having Maid Marion turn into Bella Swann as she chooses between two equally worthless men vying for her affection. I won't tell you which one she chooses, but I will say that no one in this movie sparkles in the sunlight.
Her choice sets up a sequel that will never, ever happen because movies are supposed to turn a profit, and this one didn't. If you haven't seen this movie yet, I would advise you to stay on your current path and give this one a wide berth.