Nintendo have shared gameplay footage of Monster Hunter 4 Ultimate from their E3 live-stream. Accompanying the gameplay is commentary from Monster Hunter producer Ryozo Tsujimoto, who provides some insight into how monsters are designed.
Monster Hunter 4 Ultimate will be available in North America and Europe in early 2015. New to the game is a brand new feature that allows the player to find equipment with randomized stats. You can read up on this here.