Thank you for your time and help with this!
Regarding 2 - I've noticed that a lot of published works do use fake brands and stuff if they haven't got a product deal in place, so that's why I was more worried it might be needed, but if that's the AFF policy I reckon it'll be ok. The character being referenced isn't quite as well known as Supes, but still returns a shitload of google hits so I figure she's hit the old pop culture standard.
Regarding 1 - Here is one of the stories he's had written with this OC (you can see the credit for him at the top)
http://www.hentai-foundry.com/stories/user/Monsinne/12889/Hunting-Demon
And links to pictures he has commissioned are here:
http://www.hentai-foundry.com/user/Devil_PS/profile
I've stuck with the H-F links because he contacted me through H-F about writing the story.
Thanks again!