I'd say they should be independent. They could find investors to raise the capital for the game and make the game how they wanted. Bungie has a long proven track record which would allow them attract investors easily. If I had to chose a publisher I'd say EA. Mass Effect 3 and titanfall both continued to give free content along with dlc. Titanfall suffered the same backlash as Destiny, lack of content, but has been improving. I even remember Burnout Paradise receiving tons of free content that really expanded the game.