So a
correction was released to the news that this would be a TV Anime, which says that this was a premature statement and that details about the medium/release format haven't been announced. So that doesn't necessarily mean that it
won't be a TV anime, but them going out of their way to correct it suggests that the producers aren't ready to announce that yet. It could end up being an OVA series after all; we'll see...
tl;dr: Announcement real, but release format unknown.