To summarise, the bottom line is if you're chomping at the bit to play a brilliant Contra game with excellent 16-bit graphics, thumping soundtrack (and 2-player co-op still intact) on your Wii U, you already can - it's called Contra III: The Alien War. There's practically no reason to pick this up as long as the SNES version exists alongside it, other than the novelty value of playing a couple of Mega Drive stages. While Contra Advance: The Alien Wars EX was a good GBA game, on Wii U it's simply not needed, even though the legacy gameplay still shines.