Gareth Edwards is well versed in creatures and monsters. Both of his previous films, Monsters and Godzilla had a lot of fun with the creature design, and the guy clearly has an eye for it.
That really comes to the forefront in this new Rogue One: A Star Wars Story featurette. It's focused on the aliens and creatures in the film who look to be joining the fight with the rebels. There is a ton of practical work done here, and all of it is very impressive.
Take a look:
Not long to go now to see all these critters in motion!