This image from the film’s official Twitter account shows Taron Egerton’s Robin Hood joined by Jamie Foxx’s Little John in what does not appear to be England, based on the architecture.
Jamie Foxx also looks appropriately badass as Little John in what seems to be a new take on Robin’s right hand man with elements of Azeem from Robin Hood: Prince of Thieves.
Robin looks quite serious here, as one might expect of someone who has fought in the crusades.
The folk superhero needs his costume, but I would expect a muted camouflage green, because of the dark and gritty.