Halo meant to be a PS2 game by Rockstar?

I know I can't be the first person to talk about this...
but jesus christ that's weird, I just found out about it today and looked it up on ign.com
I'm really glad Bungie took control and it became an XBOX/PC game instead.
http://ps2.ign.com/objects/014/014552.html
BUT SERIOUSLY...WTF?
and I also saw there was a HALO:DS that was canceled?
What was that all about?
but jesus christ that's weird, I just found out about it today and looked it up on ign.com
I'm really glad Bungie took control and it became an XBOX/PC game instead.
http://ps2.ign.com/objects/014/014552.html
BUT SERIOUSLY...WTF?
and I also saw there was a HALO:DS that was canceled?
What was that all about?