With San Diego and Oakland facing significant challenges in their attempts to keep the Chargers and Raiders, respectively, the head of the teams' backup plan is satisfied about the progress being made for a sparkling, nearly $2 billion joint stadium in Carson, California.

The San Diego Chargers and Oakland Raiders joined forces for a proposed new stadium in Southern California in February. The proposal was said to be a reserve plan in case the two NFL teams don't secure new deals in their current cities by the end of 2015. Neither team is close on a new deal with their current city.

The two teams hired former San Francisco 49ers and Cleveland Browns executive Carmen Policy in May to head the Carson project.

"It's got a lot of steam, "Policy said Thursday. "We feel very good about where it's at. It's very exciting."

Policy, who is hopeful for a resolution in January, said the Carson project is worth about $1.9 billion in total and will be a state-of-the-art facility. He said the proposed facility will also have the space for a western edition of the Pro Football Hall of Fame and that he has offered the league space to house its NFL Network offices there.

This week, San Diego mayor Kevin Faulconer and the Chargers engaged in a public spat that put into question their ability to find a solution this year.

In Oakland, developer Floyd Kephart is facing a Sunday deadline to provide Oakland-Alameda County Coliseum Authority, the city and the Raiders proof that he has made progress with his proposed new stadium in the city. The project has a plan for major redevelopment with office, retail and housing.

Oakland-Alameda County Coliseum Authority executive director Scott McKibben recently told ESPN.com that his group is open to exploring other options if the Kephart deadline passes without progress.