With just a matter of hours to go ahead of Microsoft's press briefing, rumours continue to suggest that a brand new title might be revealed.

Wal-Mart add further weight to this potentially gargantuan chit-chat, Joystiq landing a screengrab purportedly taken from the retailer's intranet - 'The Wire' - which lists a title called Halo Blue for release on September 20th.

Who knows whether this is the same Halo release speculated yesterday - 'insider sources' apparently revealing that the new title will be a grittier Halo offering, omitting Master Chief and focussing on squad-based combat.

More from at 10.30am PST. We'll be on-hand to keep you posted.

By Luke Guttridge