id Software's John Carmack told Eurogamer that they're in the early stages of planning a reboot of the Quake series:
"Nothing is scheduled here, people are not building this," Carmack said.
"We went from the Quake 2 and the Quake 4 Strogg universe. We are at least tossing around the possibilities of going back to the bizarre, mixed up Cthulhu-ish Quake 1 world and rebooting that direction.
"We think that would be a more interesting direction than doing more Strogg stuff after Quake 4.
"We certainly have strong factions internally that want to go do this.