Sure sounds like a desperate ploy to get the stadiums they want in San Diego and NorCal respectively, but the Chargers and Raiders are going in together on a new football stadium in Carson, CA where the Raiders have threatened to build before.
Can't imagine how this is going to work but if the Jets and Giants can share a stadium, this could possibly happen but I'd bet against it. The threat of moving to L.A. has been part of blackmailing city fathers in NFL cities for two decades now.
http://www.cbssports.com/nfl/eye-on-...-stadium-in-la