by getting a lawyer...seriously...technically you are using copyrighted material. still, depending on your country you might be allowed to use original work to parody it without having to pay licence fees. thats why any so called legal-illegal discussion is so obsolete. only a lawyer knows for sure and even then i wouldn't bet on a definite answer, because as far as i know, there was never a trial regarding this, just to assure your legal status.
BUT the more important question you should ask is: do companies care? everyone who ever meddled with the anti-piracy taskforces of those corporations will tell you: no they don't. why? because you don't sell it and the number of users are far too low to affect anything. besides, if they did, they could also take legal actions against fanart as that is a ripoff of original artwork, too. in fact they have bigger cases to rest, such as corporate piracy
Bookmarks