The Anime, Is it Wrong to Try to Pick Up Girls in a Dungeon, shorten as DanMachi, is having a movie release in Japan with no date as of yet for stateside. Although with how popular DanMachi has been I wouldn't be surprise if we hear about it shortly.
The release date for the movie in Japan is set to February 15th. Stateside no date as of yet. We do know the movie take place after the events in session 1. It will include a new character name Artemis. Returning charaters include Bell, Hestia, Liliruca, Welf, and Hermes. Before the movie release the Anime had release Session 1, A Spin Off, and a OVA. There is a Session two in the works with no release date as of yet. (And no we aren't talking about the Spinoff.)
The Past (and how to watch it)
The first session can be Streamed: Here
The first session can be Bought: Here
Sentai Film Works say this about the first session, "Some adventurers delve into the sprawling labyrinths beneath the city of Orario to find fame and fortune. Others come to test their skills against the legions of monsters lurking in the darkness below. However, Bell Cranel’s grandfather told him a different reason: it’s a great place to rescue (and subsequently meet) girls! Now that Bell’s a dungeon delver himself, the ladies he’s encountering aren’t the helpless damsels in distress he’d imagined, and one of them, the beautiful swordswoman Ais Wallenstein, keeps rescuing Bell instead."
The OVA can be Streamed: Here
The OVA can be Bought: Here
The Spin Off is called Is It Wrong to Expect a Hot Spring in a Dungeon? It's run time is 25 minutes so it's a single episode. It did come out after the Anime did so it has it's own release State Side. Not a common thing for animes. It comes with a two disk Sound Track and booklet.
The Spinoff can be Streamed: Here
The Spinoff can be Bought: Here
The spin off focus on famed sword princess Aiz Wallenstein along with some of Loki's Familias. She goes a lot deeper in the dungeon then Bell and his group goes so expect some nice action scenes.