id Software unveiled a bunch of details about the gameplay of Rage, you can read it at ShackNews.
Rage is currently being designed for controllers because "the largest chunk of our market's going to be on consoles," id's John Carmack explained, echoing comments made by CEO Todd Hollenshead earlier this year. "I mean, yes, you can use the mouse for it but it's critical that the controller be the way that we design the game."
Ideally, id would like to ship the Xbox 360 version on three DVDs, but is facing difficulties splitting the game into three parts. "We've got two large wastelands on there," explained Carmack, who added that "we can cut it into two pieces" but "couldn't make an arbitrary cut." Meanwhile, he reveals Doom 4 is "structured" so that it is "almost certainly going to be cut up to 3 DVDs versus one Blu-ray [disc on PlayStation 3]."