Just my 2 cents but this is how I could see it working out.
If the Big Ten expands to 16 with Missouri, Nebraska, and three eastern schools I could see the Pac 10 also expanding to 16.
If they add Colorado, Kansas, Oklahoma, Texas, Texas A&M, and Utah they would have a conference that divides nicely into four divisions of four teams.
Oregon, Oregon State, Washington, and Washington State
California, Stanford, UCLA, and USC
Arizona, Arizona State, Colorado, and Utah
Kansas, Oklahoma, Texas, and Texas A&M
For football play each team in your division and 2 teams from each other division for 9 game conference schedule. Like in the Big 12 in a four year period you will have played each team home and away at least once. This gives each team good exposure in the important recruiting grounds of California and Texas.
For Basketball it works even better. Play each team in your division home and away and each other team once.
The new Pac 10 network would be able to rival the Big Ten's for revenue and would include an impressive list of media markets with Seattle, Portland, San Diego, San Francisco, Los Angeles, Phoenix, Salt Lake City, Denver, Kansas City, Oklahoma City, Dallas-Fort Worth, Houston, and San Antonio.
If state politics gets in the way in either Kansas or Oklahoma you might have to switch Kansas for Oklahoma State and subtract the K.C. market but it would still be an impressive conference and a very strong and growing base for a TV network.