No one needs color.

 I love !

Have you the original please because I don't see why it was rejected.

Messy, but eyecatching. And colours aren't bad ;)

 Thanks! much appreciated, I was despairing it wouldn't escape the public queue.

Extremely artistic stuff. It definitely makes you stare at it for a while.

Pretty neat. :)

I like the guy at the bottom 

 Cheers! It would be fun to turn it into something alright

 This looks like something you'd see for a very, very, very epic movie.

 I've left it as it is, I tried to color it but I suck at color, so anyone is welcome to try!

Epic monochrome!

That's the result that I mean, but it be so much faster and easier in any program that allows for both layers and multiply mode.

 Tanuki - you mean leave the black in and color over just the white? I don't have potatoe chop so no multiply mode for me...

Personally I'd place all of this one one layer, set the blending mode to multiply, and then on a layer under it proceed to color it in (either greyscale or with actual color), sticking with just a couple of bright colors. Consider using one color for all of the background elements and a different one for all of the characters. I tested it just now with yellow for the background and a warm red for the characters and I think it worked well while still only being 3 colors total if you replace all the white with either red or yellow. :)

A bit messy and hard to dechifer. I think this should have more colors, or reworked to make it easier to differ between details.

 Well put, it's quite busy alright! So you mean 2 colors would be okay for the shapes but the details such as texture and more organic shapes / curves could do with a few more colors to calm it down?

 Looks really good, but I'm not sure that 2 colors is the best choice for this particular image. The reason is that the fewer colors you have to work with the harder it is to differentiate between objects and details, so typically with a very low color count you'd want to work with more simple objects and details. The high detail level here can make it a little hard to spot individual characters at first glance without the aid of color to set things apart. It's pretty well drawn though. :)

 Thanks! crits welcome.

 Really impressive for only two colors!