Again an epic rendering from you.
To be honest though, I prefer the old one.
The old one had more of a weirdly happy feeling to it, almost a bit like a good old comic strip.
The new one, feels cooler, more straight to the point. It is really well made, don’t get me wrong, but something is missing. I got the old one in my desktop-wallpapers switcher by the way. The new one will probably join soon.
Sooo, tipps: Hm. Not much really. Give Steve a background - complete black doesn’t really work. Personally I’d go for some medium bright to light colour, maybe some 70s tapestry, but if you want a dark theme, put up a poster behind Steve. If you really don’t want a background, but focus only on him, make a slight gradient, so it is a bit brighter around Steve. Other than that, not much to say, except “Awesome artwork!”.