I just read an article of gamepro about the 20 greatest unfinished games and it had Halo DS, i remember IGN posting a video with the editor playing the demo to show that it was in fact real.

In my search for info, on wiki it said that Bungie didnt end up finishing it because it was an unsolicitated pitch.

Wow, imagen if the game was to have been released, i think it would have sold millions, i dont think it would have gone the GTA:CTW way.

So, did Ninty not pick this up or was Microsoft responsible for it not being made?

I believe it would have sold millions.

It was an unsolicited pitch by a developer (i believe using the engine of a ds james bond game) nothing to do with ms or bungie, for whatever reason ms decided not to bother with it, if it had been released i expect it would sell initially probably similar numbers to what gta ctw sold and probably finish up with a couple of million (which incidently is about what i expect ctw to end up selling)

It would have been neat, but the DS's graphical capability wouldn't have done the series justice.

Actually, it would have gone the GTA: CTW way, which is to say that it would sell millions...OVER TIME.

you'll see it on the Zune HD or whatever MS has planned for the portable market

It would have done no better than GTA Chinatown wars