Ryan McAvoy said:

Stumbled onto this alternate 1980 Coca-Cola poster I'd never seen before...

Boris Vallejo's paint work is fantastic and much more fantasy styled than than most posters but the Duel-Lightsaber-wielding Vader looks hilarious to me. Almost like he could be shouting "Yeaaarrggh f**k the Rebels!"

I think it's the small size of the sabers that makes the image look silly. If they were closer in size to the film sabers then it would look much better.

Oh, and Vader's oversized arms/hands probably don't help any, either.