According to the official website, Mahou Shoujo Lyrical Nanoha: The Movie 2nd A's will be premiered next summer.

Source: Nanoha official website

According to Kadokawa Pictures, the premiere date of Strike Witches Movie was announced to be March 17th 2012.

Source: Kadokawa Pictures

Anime Movies Due in or after 2012
.hack//The Movie (Jan 2012)
Berserk Ougon Jidaihen I: Haou no Tamago (Feb 2012)
Dragon Age: Blood Mage no Seisen (Feb 2012)
Strike Witches Movie (Mar 2012)
Precure All-Stars Next Stage (Mar 2012)
Detective Conan Movie 16: The Eleventh Striker (Apr 2012)
Momo e no Tegami (Apr 2012)
Gothicmade: Hana no Utame (Spring 2012)
Blood-C: The Last Dark (Jun 2012)
Berserk Ougon Jidaihen II: Doldrey Kouryaku (Jun 2012)
Toshokan Sensou Movie (Early Summer 2012)
Mahou Shoujo Lyrical Nanoha: The Movie 2nd A's (Summer 2012)
Fairy Tail Movie (August 2012)
009 Re:Cyborg (Autumn 2012)
Evangelion: 3.0 Q Quickening (Autumn 2012)
Berserk Ougon Jidaihen III: Kourin (2012)
Kizumonogatari (2012)
Tiger & Bunny Movie 1 (2012)
Tiger & Bunny Movie 2 (?)
Steins;Gate Movie (?)
Ao no Exorcist Movie (?)
Toaru Majutsu no Index Movie (?)
Mahou Shoujo Madoka★Magica Movies (?)
Gintama 2 (?)