Please help me find this anime movie.

I saw a trailer a while ago about an anime movie I think? I remember something like a boy travel to the death world and meet his mom(?). Then he rescue her from the death world and basically run from death or something. The animation is incredible and remind me of Shinkai Makoto movie. The trailer is pretty new so either it was out for the past few year or the on coming year. Have anyone watch that trailer?