Thanks to the official Twitter of LEGO BATMAN we get the first look at the Killer of Superman DOOMSDAY! as we can see he is clearly a big figure, while no other details have surfaced he may be part of the storyline as it has been clearly established that it takes place in outter space
Also noticed that the account sent out this teaser for Brainiacs ship, while not confirmed we can also speculate as it might either be a level or a ship used in the free play of the game.
Here's the picture.
LEGO BATMAN 3: BEYOND GOTHAM Builds it way into stores on November 11. The best selling LEGO Batman videogame franchise returns in an out of this world. action packed adventure! In LEGO Batman 3: Beyong gotham the caped crusader joins forces with super heroes of the DC comics universe and blasts off to outter space to stop the evil brainiac from destroying the Earth. Using the power of the Lantern Rigns. Brainiac shrinks worlds to add to his twisted collection of miniature cities from across the universe. Now the greatest super heroes and the most cunning villains must unite and journey to different lantern world to collect the lantern rings and stop Brainiac before it's too late.