Unlike other anime publishers in the North American market, it isn’t that common in my opinion for Sentai Filmworks to release an actual trailer for a series, something which given the right context can really draw attention from anime fans (My memory shifts to Funimation Entertainment with Strike Witches for example).
But Sentai Filmworks have chosen to put together a brief trailer for Kokoro Connect, which has just launched on both DVD and Blu-ray in North America.
Hanabee Entertainment have a similar release planned in the next couple of months for Australia.