A full 90 second trailer for the ReLIFE live-action film has been released (as well as a 60 second version for anyone whose life is too busy and exciting to spend a measly 30 extra seconds watching a trailer).
https://www.youtube.com/watch?v=m5FsR7eQZoA
While the Japanese film industry is certainly competent enough to - from time to time - produce a compelling high school drama, considering its recent track record with live-action adaptations (Attack on Titan, Terra Formars, I Am A Hero, Shinjuku Swan, Lupin the III), we're not holding out a lot of hope for this one.
Fans of the anime/manga that were going to watch this one anyway (and happen to be in Japan) can set a date for April 15th, when it's slated to be released in Japanese cinemas.