Rumor: Halo prequel action/adventure Bungie's next project?

Oh, joy — I smell a return to Marathon. Or Pathways Into Darkness. Whichever, they’re both pretty awesome games. According to the rumor mill at 1up, Bungie’s next project may be “a third-person action/adventure shooter hybrid that takes place before the original Halo, chronicling early skirmishes between the ODST troops and the Covenant”.

Not exactly the plot of Pathways, and I’m not sure how the various factions you fought with and against (Pfhor, S’tht (sp?)) in Marathon are related to the Halo world. I’ve never been a big Halo fan, but I respect Bungie and I know they’ll make this good.