User blog comment:TheIrregularOne/Why not OVAs?/@comment-11437688-20140106002621/@comment-11437688-20140106062115

Actually, I do hope those side stories get animated (who doesn't? XD), but I won't expect that to happen. OVA's usually require more budget than normal series due to it's sheer freedom, but it all depends on their business strategy.

Usually, those characters that are used in OVA's are the popular ones in order to appeal to more audience, thus more money. Given this strategy, if ever they would animate a side story for OVA, the highest chance would be any side story with Mikoto in it (Liberal Arts City, Railgun SS2) since we all know that she is the most popular character in TAMNI and thus the main market in TAMNI franchise.

As for the other side stories like Stiyl SS, Kanzaki SS, etc., chances for OVA are very low.

You know, money always matters... they will always choose the path that earns them more money. XD