The teaser trailer for Teenage Mutant Ninja Turtles: Out of the Shadows has dropped online.

The film is the follow up to the critically mauled, yet reasonably commercially successful 2014 reboot. 

Plot details are light except that there seems to be some sort of alien threat that the turtles will have to deal with. Also, Shredder is back causing problems, particularly in the form of mutating comic book baddies Beebop and Rocksteady. 

The sequel will also see the introduction of masked vigilante Casey Jones (Arrow's Stephen Amell) who becomes a love interest for Megan Fox's April O'Neal in the comics. 

Aside from all that we can expect action. Lots and lots of action (this is a Michael Bay production after all) and a little bit of Laura Linney bizarrely. 

All will be revealed next June.