It's delayed, again.
A German article (there's also an English one but with less detail) recently popped up on Brandora with some details about the merchandise we can expect for the Filly Stars. It also says that we can expect a range of toy products based on the TV series, that it's progressing very well, and hints that there will be a DVD release.
But unfortunately, it also says that the release of the show is now planned for Q1 2016. The last known previous estimated release date was Autumn 2015, which was given in a YouTube comment from the official BRB account in October last year.
Meanwhile, the text on fillyfuntasia.com still says "26 x 26' CGI TV animation for 2014" as of writing which is getting increasingly outdated.