I really don't understand the pricing. The digital deluxe edition is $80 -- that's $20 for 3 characters and a premium skin. That's more expensive than MKX's DLC. It appears that you can "save" $20 by purchasing the $100 bundle, but it's $60 if you want to buy the three character passes individually.
CP1 ($20) - 3 characters, Power Girl alt
CP2 ($20) - 3 characters, John Stewart alt
CP3 ($20) - 3 characters, Reverse-Flash alt
Ok, yeah, that's not as good a value, but not too far from the norm if character are $5 a-la-carte. There's also that extra color effect, whatever that is.