BUR #39709 has been approved by @nonamethanks.
create implication the_lego_movie_2:_the_second_part -> the_lego_movie
create implication the_lego_batman_movie -> the_lego_movie
Do I need to say it? It may not seem necessary, but hey, it had to be done. As LEGO Movie 2 follows on from the first film, so is The LEGO Batman Movie, as that film is a spin-off to The LEGO Movie.