5004916 Kai’s Dojo Pod includes a Kai minifigure and host of accessories, in a similar style to 5004929 Batman Battle Pod
5004915 Mater Wu key chain is polybagged, much like 5004928 Kiss Kiss Tuxedo Batman, which eventually turned up at Argos.
5004394 looks to be a smaller version of The LEGO NINJAGO Movie Movie Maker, including a Jay minifigure, smaller brick built stand and backdrop.
It is currently unknown how any of these items will be distributed. The most common method is through promotions at shop.LEGO.com, but given the unusual ways that some of The LEGO Batman Movie exclusives turned up, that is in no way guaranteed. It’s a far cry from the 2014 release of The LEGO Movie, which only saw a handful of exclusive promotional items. This time, collectors will need a scorecard just to keep track.