According to the newsletter of Gagaga Bunko, the light novel "Toaru Hikuushi e no Koiuta
" (Love Song of a Certain Pilot) will get an anime adaptation. No more information is available yet.
The light novel is part of the "Hikuushi" (Pilot) series and has 5 volumes altogether. In fall 2011, another novel of the series, "Toaru Hikuushi e no Tsuioku
", was adapted into an anime movie of the same name
. "Toaru Hikuushi e no Koiuta" took place in the same world but at an earlier time.
Source: Scan of Gagaga Bunko newsletter
Toaru Hikuushi e no Koiuta