I'm not entirely sure how to say this so I'll just blurt it out. Sorry in advance.
This is primarily intended for Wildbow and Drew Hayes but it's general enough that I thought this might be the better venue, rather than cyberstalking for emails. If anyone disagrees just say the word and I'll ask the editors to delete the thread.
I write a superhero-ish web serial that has more than a few similarities to your own works. I don't think it crosses the line into plagiarism or even being derivative, at least no more so than the genre as a whole. However, I've had enough comments made on my site that I felt like it should be addressed. I won't even attempt to deny that there are a lot of points of comparison, and a few homages, just like there are with several of the big name comics. Unlike Marvel and DC, I actually respect you two and realize that even a minor issue could have real implications for you.
If you feel that I have crossed a line, or even that I'm tiptoeing near one, please let me know and I'll take whatever action is appropriate up to and including shutting it down. I'm not an active poster in these forums but I do pay attention to them. You can also just leave a comment on my site or e-mail me (unillustratedauthor at gmail dot com).
To everyone else: sorry if I come off as a drama queen but this seems important to me.