It’s difficult to tell how anything from that trailer will actually look in context. Much more so than the previous trailers, it was cut with extremely quick shots and looks more like most modern movie trailers.
True, however that’s still a stormtrooper fighting a guy with a lightsaber.
But yes, it could end up being like a 5 second fight that the trailer is blowing out of proportion.
It’s still such a weird image to me though. I guess Abrams might be paying homage to some of the old MacQuarrie artwork of stormtroopers with lighsabers.