That said, the equally nice trailer for the game to be release along TL, called Tron Evoluion, which looks equally neat, speaks of a war. So the bleakness can probably begin to be explained somewhere there.
Still, this post is not to tell you how awesome the trailers are, but to point out something amusing I noticed about the end of the second trailer. Everything about the way the title is written, to the sounds, the style and even the low bit percussions, with that vibrating/throbbing effect, remind me of the intro of Switchblade II.
I'll let you compare (the title appears at 1:55 but I can't force the time index on my page, so try that link if you want to go straight to the right moment, or click at 1:55 on the time bar below the video).
Pot or no pot?
That said, the way the Tron title assembles itself reminds me of the first Switchblade.