According to BBC 1 controller Peter Fincham, the Spice Girls will feature in a new documentary this autumn, to coincide with their upcoming (and previously reported) reunion world tour. They're also getting involved with Children In Need, apparently, and may well be releasing a single for the charity telethon.
On the documentary, Fincham said: "We've got full involvement from all of them," adding that "they are all keen to get involved with Children In Need. They are recording two new songs and one of them might be a single".