Hisstank.com has published a few words from Ray Park on playing Snake Eyes in Gi Joe: The Rise of Cobra. It's buried about halfway down this article after Di Bonaventura's rambling about the GI Joe submarine and the hassle of naming it.
The most startling -- even scary -- revelation is that Snake Eyes will add a bit of breakdancing to his duel with Storm Shadow. Park calls this an homage to Snake Eyes... I'm guessing from the cartoon. I don't recall Snake Eyes II: Electric Boogaloo being part of the comics, but maybe I've just blocked the horror from my memory.
Park discusses how fighting with "katana swords" is sort of his style. Funny, I don't recall too many katana being used in wushu... He's really excited about the bladed tonfa. (Must... resist... pedantic... urge... to point out... Tonfa... ugh... aren't a ninja weapon... Aiiiieeee!!!) And don't believe him for a minute that Storm Shadow "just" uses swords. I have an inkling about this bit of misdirection; which is also a sort of homage...
All kidding aside, I expect the martial arts sequences to be among the best parts of the film. Hopefully they will make up for the dreadful drek like watching Ripcord (Marlon Wayans) hit on Scarlett (Rachel Nichols) for no good reason related to the plot or mythology.