I have to start by saying that for a newcomer, your figurework's exceptional. The faces are realistic, the anatomy's believable and you show that you can draw a wide variety of ordinary-looking folks in addition to buff superhumans. It does get inconsistent at times-- the Hulk has some very realistic poses in some panels on page 2, but seems stiff and unnatural in others-- but on the whole, it's amazing stuff.
My recommendation is that you work on your layout and storytelling. The spatial relationships between characters-- their physical locations in a scene as it plays out-- aren't always clear from panel to panel. For example, when you introduce Logan and the Hulk, you don't make it clear that they're anywhere near one another-- Logan's down by the Thames, while the Hulk seems to emerge from the subway somewhere in the central city. Then all of a sudden, Logan's on top of an office building right where the Hulk is leaping? And how'd that woman get a car on top of a building in the first place?
I suggest you give your layouts a bit more room to breathe. Use larger panels to introduce an overall location for a scene before you start focusing in on its smaller details. And when you do focus in, try to include small details in the characters' surroundings, or in the background, that will let the reader know where these characters are in the larger scene you've established.
I'm writing a Webcomic series set in London, and I've been looking for an artist with a realistic style and a way with action. I don't know what you've got on your plate, but you'll find scripts and contact info via the link above if you're interested.