Disney unleashed their new teaser trailer for Alice Through the Looking Glass and it features the recently departed Alan Rickman's voice. He lent his dulcet tones to one of the movie's main characters, the Blue Caterpillar. 

Narrating snippets of the trailer, it kicks off with Rickman saying "You've been gone too long, Alice..." This second Tim Burton instalment is due for release stateside in May this year. Most of the original cast return, along with Sasha Baron Cohen appearing as 'Time.'