Guys, Starcraft is RIGHT. If this game was designed to use DLC - and it is - it is almost certainly capable of using all the textures and models from the disc based version of the game.

Depending *what* the new area is (and how big it is), it could take as little as 200MB - and top at any size you want.

If T2 wanted the content to be bigger (say 5Gig, rather than 2Gig) - I doubt MS would complain at all. It means more content, which is the real selling point. It just means its easier for MS to rub Sony's nose in it.

 GTA4 is in the same city as GTA3, people clearly are still buying it,  i'm pretty sure the same will apply to a san andreas xtension

If the content on the disk is used it wont be a massive dl. The business model is vary viable. They have less expenses per sale and the huge sales of the call of duty 4 map pack point to it being extremely viable by the time it hits live. The map pack sold something like a million times in 9 days. Consider that GTA 4 will significantly increase xbox live membership and you've got DLC that will make a lot of money, sell very well, be less expensive to distribute and not an overly huge file.

 I dont see whats wrong with what Starcraft said. A new island will use the same game engine and graphics. Think somewhere between Knights of the Nine and Shivering Isles for Oblivion. Anyone downloaded these and remember how big they were?

its possible if its online only it could be a few megs (cod4) i dont think its a map tho i think a few more missions since MS said messured in hours who would get bored of sa in 20 hours? its also alot of work too make SA since its bigger than LC hmm i cant wait till thay say what it is i hope thay say at E3

Ah.  Didn't realise it was only for XBLA games.  So there is essentially no limit on DLC size in principle?

in vice city storys there is a bill board for a plane too SA or liberty city i forgot

Knights of the Nine ~200MB
Shivering Isles ~1.4GB

Anything more and it will be almost an entire new game (i.e. new city). I think it will be around 1GB each and be 10 hours (4-5 new NPCs on a new island travelled by airplane, much like portal in Shivering Isles) added for each episode.

Let's hope the DLC was well worth MS $50 million dollars.

My first thought was that it would be an emulation of GTA: III, VC or SA playable in an arcade or something. Probably a stupid thing to do, but it would be so cool. So. Cool.