The Originality and proportions are correct, and the characters have been studied carefully. You did just as awesome, and with the right style, the right way, and even with the right colors. This has shown alot of connections with the 90's, and even with the modern twist, and I see that you had made it so the new generation can interprete it, and you've shown it as a work of art, and even to have made it away of great potential. Keep it up and you can go the distance, and get to your goals, pleasant journeys to you, good-bye!
I'm torn on Wolverine. Though. I think he's got the ugliest costume in X-Men history (and his mask looks like two Batmen staring at each other), and his popularity and god-tier status he's got in MvC3 makes me hate him... But he's awfully cool once his costume is off and he returns to his Logan antics... T_T
But man, I love the picture. You get mad props for Jubilee.
I honestly prefer his old Brown and Orange suit. Never a big fan of the bumblebee look, which is why I left those stripes out of my version. I've seen the image of the two batman's kissing, but I still like Wolverines Mask.
Ahh, nice way of getting a little back on track with the "Draw a superhero a day" thing, do two until you're caught up! Hooray!!! XP
Seriously though, nice work, you've got quite an interesting art style, remonds me of the actual relatively recent X-men series, evolved? Incredible? X-treme? I don't know, but it's cool none the less.
I've seen some of those designs, though I've never worked on the shows myself. Working in animation though, and seeing the works of people like and have certainly been influencing how I draw. Not that I have any delusions of becoming a character designer, mind you.
As for doubles... I'll definitely do that when it makes sense to. Like, I know I want to draw Hulk, but I'm not sure who I would want with him.