Bungie recently dropped another teaser trailer about how their brilliance has been creating Destiny. This trailer is a bit more about the multiplayer aspect and how it will possibly work in an MMO sense.
The way that we can make the world feel really rich is by putting people in it.
There is nothing less predictable than human beings. Furthermore they go on to explain that players will be able to interact with one another whether it be in the market/town areas or out in the field with special events. Players will have the option to join in or to opt out and continue about their business.This begs the question of exactly how open is Destiny actually versus how instanced will the game be?
More information should be revealed at E3.
Beta is expected to start in July while Destiny is expecting a release of September 9th.