How about a name change? The A's have a long history of moves with the same name, it's a generic name and while it's a pretty stupid one when you come to think about it, I guess they can keep it. The city of Fremont isn't known for anything, there would be no name I can think of which would capture its spirit. If it even has one.. Maybe The Trailblazers, which is what John C. Fremont was, back in the day, would be okay. Somehow The Fremont Cartographers just doesn't pack the same punch.
The 49ers, on the other hand, is a name attached to The City, and Santa Clara/Silicon Valley was not a part of that history. If the team moves to techville, it needs a techie name. Techie but sporty. The Santa Clara Silicons? Nah. The Chippers? Too much like the Clippers. The VC's? That would work, until some sportswriter cretin screwed it all up by expanding the abbreviation out to its full spelling. The Rockets? Maybe, thought NASA here is known more for its software than hardware scientists. The Mars rovers have a deep tie to NASA Ames, but calling the team The Rovers would hit too close to home when they moved. I know -- the stadium is planned for what is now the Great America parking lot. What better name for a football team these days than The Americans? Sure, Silly Valley is probably 80% H1B holders and their families, but football is the last American sport where the players are overwhelmingly natives.
Edit Add: Looked it up. The A's started in 1901 in Philly, moved to Kansas City in 1955 and on to Oakland in '68.