Microsoft has registered a series of domains revealing something called Halo: Spartan Assault.
The domains in question are SpartanAssault.net, HaloSpartanAssault.com, Halo-SpartanAssault.com and others. The domains were registered last Thursday.
It isn't clear to what the new domains relate, however. Spartan Assault could be a new entry in the Halo game series, the title of the Steven Spielberg live action TV show or something else entirely.
E3 begins next week and Microsoft's conference is set for Monday, June 10 - which promises to be full of new game announcements for Xbox One.