That said, there is not expected to be any direct crossover between the next two LEGO films, but a cameo by one of the Ninjago ninjas in LEGO Batman Movie could be in play.
That said, with no marketing yet to be had for Ninjago, WB will have to push the film heavily ahead of its October release date. This will be an easier task if LEGO Batman Movie is a hit just like The LEGO Movie, making audiences more interested in seeing another LEGO film so (relatively) soon.
The Ninjago LEGO sets are relatively new additions to the LEGO lore.
We should have a better idea of whether or not that’s the case, when the LEGO Ninjago Movie trailer hits the scene.