Gearbox boss Randy Pitchford has said that the developer's platform tech director - Corrinne Yu - moving to Microsoft is "really exciting." This probably does mean Halo 4's on the way, then.
“We are really excited about Corrinne joining Microsoft,” Pitchford told MTV.
“I expect her to bring a lot of passion and inventiveness on that side. I think there is a lot of value for everyone for this transition.”
“Meanwhile,” he continued, “Gearbox is really excited about the changes we’ve made to our Platform department in-line with finishing Brothers in Arms: Hell’s Highway in order for our platform engineers to support the multi-platform launches of Aliens: Colonial Marines, Borderlands and an un-announced big-ticket game.”
Which is Halo 4. Probably. Probably yes. More through the link.