That would be QUITE the utility indeed... unless of course all you want is a pure text document. Because when I picture a Wiki page (specifically an Ouroboros Portal character page) I'd like it to have at least one picture of the hero in question as well, which means that this utility would have to be able to interpret the .costume file and ALSO take a screen capture AND make it into a JPEG or PNG AND upload it to the Wiki in question.
So, at the very least, we are talking some sort of program that reads the Sentinel+ data, opens Icon, loads a costume, takes a screenshot, crops the screenshot, saves it in an image format, can then auto-upload to the wiki, and then takes all of the generic text data from that same Sentinel+ file and spits it up in wiki markup language to make a page...
Yeah.
So, potentially doable, I think, but man would it take some doing on the programming end...