According to April issue of of Comptiq magazine,  Fate/stay night manga spin-off series, Fate/kaleid liner Prisma Illy will be getting an anime adaptation.

Furthermore, the fifth and last volume of the Fate/kaleid liner Prisma Illy 2wei will be released on March 26.

Synopsis
Features Illya as a main character where she’s living an alternate life as a school girl. However, she is chosen by the Magical Stick Ruby and is involved in a quarrel between Rin (Kaleido Ruby) and Luvia (Kaleido Sapphire).

[Source]