I don't think anything is officially confirmed for this game, but reports have said that Destiny feel and plays very much like Halo does, so I would imagine it will return to First-Person.
Fear not, my brothers! The next generation of gaming is upon us! Be glad! A reward for all your toil and all your sacrifices is upon us.
There are those who said this day would never come. What have they to say now?
(Yes, I ripped off a quote from Halo 2 and modified it to my own purposes. Sue me.)