Interesting idea here
I must admitt its still an interesting idea with this one, i like him popping out or being swallowed by the backround thats always something neat and differant, i think as an added effect you could have added like some "BUBBLES" in the backround also like its some sort of liquid backround, and would just show more of something just taking him away, also love the referance to the green hero so that was pretty neat, things to improve on this besides the bubbles, not sure maybe some more texture in the backround, So with all that said this was pretty intersting, i like some of the ideas in here, i like the detail and art style the effort really did comeout, and i was generally pleased, keep up the decent art work.
~~THINGS TO IMPROVE ON~~
Now as for some ideas of improvment, well this is where i suggest a few ideas and tips, your art piece was pretty good to be honest but there are a few things that could be worked on to make look better and have an overall better outcome so here are some tips i found. But i suppose with this one it was not much maybe some "BUBBLES" and some texture in the backround as suggested in the review.