Already watched in theater... Yep you are late. Also, Fairy Tail Dragon Cry is coming in US theater on Aug 14th.
It has Lina in it, so maybe it's a hodgepodge of characters, or a form of glossing over some of the volumes? Because the description of it doesn't sound like it was in the novels.
I'm honestly sick of movies right now. I missed SAO ordinal scale because I never fking knew it was happening. as a result even now I STILL can't watch it... and honestly, mahouka needs a season 2 to get to the fun stuff more than it needs a movie. a movie is best AFTER season 2, not before it....
2nd spring ? so the completely skipped the vampire/ghost arc and introduced major sirius in the movie ??