I don't wanna be rude, don't wanna insult you or somehow assert myself or... you know.
I wanna give you little portion of sober criticism.
From the far - image looks messy and a bit random. There is no solid environment where everything happens. Things, happening on the image, have no affect one to other. And i mean shadows, lightings, reflections for example. You put some effort in shading Marine face, but there is no one crisp shadow on the floor. No one local light reflection from ur lightings. Next time start your work from enviroment, put effort in details, make it eyecatching and interesting. Your tufts of grass has any destination? Any art meaning? Or they are placed totally randomly in some spaces between legs\hands and other "intresting" items? Same about sky, about the floor (way too random) and hill texture. Totally no shadows and too random texture. Without shape.
The second your critical mistake - your character's anatomy is really broken off. Most has no neck, poses are static and unimpressive.
For example Marine falls, like he was paralized and lost balance. Lich King's pose is totally unnatural. Try to make this motion urself, i mean chop with twohanded sword. You will see the difference. Every pose has some static looking, and that makes this image too static, undynamic. There is no blood and drive.
Air and environment perspective. I already said some words about environment quality, but there is something more - space between characters and perspective. The point is that the thing from far has much less saturation and less details. Same about reflexes and lights. From the far object is mostly contour, but not 3D object. So, these refleces on Furion and Pudge - just drag unnecessary attention.
And the last thing, whih makes this image really unnatural. There is totally no horizon line. There is no object on image, which is higher than the horizon line. That means - perspective do not exist on the image.
And i am sorry if my words hurt you.
