I normally use Anime News Network by searching for a series i'm interested in and seeing if it has a licences for english, this can normally be found further down a page where it lists who does the translations and Voice Actors if it was dubbed. it would also list distributors and internet streamers (like Crunchyroll).
However there seems to be a list for upcoming home releases here, i can validate the Kill la Kill release with a recent Madman email advertising it's release in Australia. However credit should go to this comment as i actually didn't know about the list on Anime News Network.
with the list if you click on the DVD you want then scroll down to the encyclopedia link and scroll down the next page to "English companies" you can see who the distributors are and to what context their releases where (if they are iternet streaming, subtitled, if it has an English cast then it's been dubbed)