At 1:40, you can barely hear Pac-Man's victory theme, which is the Level Start jingle from the original Pac-Man. Can't tell if it's remixed or not.
In the 3DS trailer, multiple modes are shown, but based on what on the screen, I think it's confirmed that Spectator Mode is back and keeps the betting mechanic. The bottom of the screen says "Finish spectating and return to the menu. (Any gold you've bet will be returned)" Also at the top of this screen we can see we're about to view a "For Glory / 1-on-1" match on Spirit Train, confirming Spirit Train having a Final Destination form and that there's a 1-on-1 mode you select when playing For Glory.
Also when showing off a "Tips" menu, it appears the "Footstool Jump" have been renamed to "Stepping Stone Jump."