I was enjoying some intelligent debate with some other forum members regarding this here(ignore the flame posts at the top of the page):
 

The days of games without any DLC are going to come to an end.  There is a reason software publishers and devs love the idea of digital distribution, and its so they can monetize content.  As software development gets more complex and more costly developers have limited options as to the avenues they can take to remain profitable.  They can cut features, increase retail disk price, or monetize non-essential content that is unnecessary but adds to the appeal of the game.  I'm sure another retail disk price won't be widely accepted at this point but I can definately see it on the horizon.  Along with that, we'll see more and more micro transaction/DLC type content.  
 
Overall, developers have been pretty good about what they choose to sell as DLC.  Most everything I have seen is a value added type download.  Something that could have hit the cutting room floor before it saw the light of day, non essential extras.  Borderlands DLC was a good example.  You could tell this was a non-essential add on, but it was a whole new zone with a lot of new quests.  Due to the game's delay, they held back the DLC until a little too late IMO.  As bad as it looks, I would have preferred this be week 1 DLC, because it was a very Halloween esque theme and would have been great for that time frame.  Instead, I'm sure in part to appease people like yourself, they held it until thanksgiving time, although it was still enjoyable.  This is a great example of value added DLC, something that could have been just a tech demo and never seen production time due to no added benefit to the developer.
 
The one you are complaining about here is even better(referring to Heavy Rain: Chronicles DLC).  If you pre-order Heavy Rain you get some free short stories, completely non essential to the primary game.  This is not like selling a novel chapter by chapter.  This is like selling a novel, and having companion short story books that go with it using the same universe(and you get them free if you order the book early).  As an added bonus, if you don't pre-order, you'll still be able to buy them later to see some more Heavy rain if that's what you're looking for.  This is all completely non-essential stuff, so complaining about not getting it is useless.  The game is NOT incomplete without it. 
 
Using DA:O as another example.  The way it is presented may not be the most tactful, but there is absolutely NO requirement to buy DLC for that game.  You can play the entire thing without buying the extra content.  I do agree that the way it is presented is a little off-putting, and I can see this becoming a good trend you'll see more of in RPGs to come.  If you can appeal to a gamer in some way other than via a clinical looking menu, you're probably more likely to make a sale on that content.  you can't fault them for finding a way to sell the product that is tempting to potential consumers. 
 
DLC may seem like gouging to you, but again, it is all optional stuff.  It encourages extra development time dedicated to a game with content that otherwise may not be there AT ALL.  Since they can charge for it, DLC becomes something they can spend some more time on.  This is not bad for the consumer, because in the end you've already paid for your game in a playable and complete form.  If anything they add is non-essential it doesnt matter at all, its a bonus for people who want more, and it's ignorable for those who are allergic to spending money on more content.  
 
Personally, I love DLC.  It means when i finish my time with a game, I might be tempted to play it again in a few months when the DLC hits.  For a bit of extra money, it renews my interest in a title I currently own.  IMO, the Heavy Rain Chronicles are a brilliant addition, giving consumers more than what they would have gotten for pre-ordering, and allowing those who want more heavy rain to get just that.  This is very good for consumers and game developers/publishers alike.