OP, are you sucking stupid through a straw?

I don't think you understand DLC...

That's not how videogame production works. If you constantly delay the game to squeeze in more content, you'll never release a product. There has to be a cutoff point. Not to mention, consumers these days fully expect downloadable content and are ready to pay to extend the longevity of their game. Especially since Destiny is supposed to be a living universe that evolves, I wouldn't be surprised to see several expansions, be they free or not.

OP doesn't understand DLC.

I read in the Edge Magazine that there are 4 games planned and 4 DLCs I am assuming these will be big story content, with little updates that will be released in between.

Not all DLC is intentionally kept out of the game to sell at a later date. I mean, EA does that, but they're the worst company in the world.