Microsoft has gone domain-name crazy over the last week or two, having secured a number of web addresses relating to a product called Halo: Spartan Assault.
It's not quite clear what exactly this is for. A report on Fusible
suggests that the domains - SpartanAssault.net, HaloSpartanAssault.com, Halo-SpartanAssault.com, Halo-SpartanAssault.net, and HaloSpartanAssault.net - refer to the recently-announced Steven Spielberg Halo
The domains were registered in late May through a company called MarkMonitor, of which Microsoft is a "well-known client".
Microsoft has said that it will focus purely on games at E3 next week, so whether Halo: Spartan Assault relates to anything that has yet to be announced or a confirmation of a collaboration with Steve Spielberg remains to be seen.