What will Mark Davis' new mega-mansion have in common with his Las Vegas Raiders team's practice facility and stadium???
They'll ALL look alike ... this according to records obtained by the Las Vegas Review-Journal, which show Davis is building a $14 MILLION crib that'll resemble his team's current Vegas building!!!
According to the report, the NFL team owner has already broken ground in Henderson, Nev. on the new place ... which -- as you can see in photos -- will look like a spaceship.