Aquarion evol would be a good grab seeing as how you already have the prequels rights and would only make sense to take the sequel.
To Aru Majutsu No Index 2 (A Certain Magical Index 2) Everyone whose interested in the first season like me would automatically want you to pick it up only makes sense to have the last season seeing as how you have the first and railgun.
Sket Dance is a interesting, and comical anime series which could give your company a boost.
Seikon no Ichizon. Comedy/Harem/Parody
And here a small list of titles airing in summer that could spark your interest.
Sword Art Online- Action/adventure/game/romance. Its a title that has somewhat medium to high expectations.
Dakara Boku wa, H ga Dekinai its somewhere along highschool dxd standards so if you're still going for titles like that there's one you could nab.
Koi To Senkyo To Chocolate Another interesting comedy/romance/school type anime. Adapted from a Good Selling Japanese game.
Campione! Action/Fighting/Harem/Romance anime
Kono Naka ni Hitori, Imouto ga Iru Comedy/Harem/Romance Its manga seems somewhat popular so theres a big point there seems somewhere along the lines of sankarea, maybe a little better.
Hagure Yuusha no Estetica Action/Fantasy/Fighting? seems to be something along the lines of Sword Art Online, and Campione! not many details on it yet.