She added that the programs will include "a high-profile project based around "Halo," with Steven Spielberg producing.
Tellem's words come as Microsoft - and also Sony - is trying to put the video game consoles in gamers' living rooms.
Tellem says that her team at Microsoft is still at work figuring out what sort of content Xbox owners will want to see, as well as the business models most conducive to producing content on the Xbox platform. Still in the works are the number of episodes that will be on order for any particular series.
"Depending on the piece of content, the deals change," Tellem said. "We're talking about exclusives, exclusive first windows, exclusive second windows. We play a lot with windows and co-production arrangements" and "whether we feel these are ideas are franchise building or we can own completely."
With 48 million Xbox Live subscribers on more than 72 million Xbox consoles around the world, Tellem has a large base of viewers to put her first shows in front of.