Although GoPro is rumored to be in fiscal distress, they seem to be pinning some of their future on the release of their new Karma drone. Rumors say release date by the end of June this year.
Although details are few and far between, the price is the biggest unknown. One rumor reported by PC Advisor (UK)seems fairly certain, however, it is supposed to be shipping without a camera, so you'll be able to slap on your Hero 3 or 4. This should keep the price competitive with DJI's Phantom 3.
Bobby Brown's Aspen Snowmass video shows some very impressive video from the Karma. Short but sweet.