“Tron: Legacy” is no doubt the Sci-Fi Must See of the holiday season.   My thing is, there are millions upon millions of moviegoers who’ve never seen the first “Tron.”  I barely remember seeing it on VHS.  Make no mistake, there’s a rabid cult following for the original “Tron.”  No spoilers here. NewTron begs you to do one thing: Your Homework.  That is to say, do yourself a favor & make sure you see the original before seeing the sequel.  Yes, of course, nowadays filmmakers will make the sequel a ‘stand alone’ adventure, but the tone & themes are all right there for you to absorb & enhance your experience.  I’ve seen the 23 minutes preview of “Tron: Legacy.” Joe Kosinski, making his feature film debut, gets it.  “Tron” was so far ahead of it’s time, anyone taking a shot at the sequel must ensure visual pyrotechnics. Show me something.  Give me that feeling of ‘WOW!’ The sleekness of the future looks daunting as if to say, if you’re not up to speed, you’re gonna get left by the wayside.   The images, sound design all look fine.  The most important thing here is story.   The first story of Kevin Flynn(Jeff Bridges) is woven perfectly into the fabric of the sequel with son Sam Flynn(Garrett Hedlund).  I’m looking forward to “Tron: Legacy,” after my homework, re-watching the first “Tron.”