Lots of assumptions, but I forgot he was in megalopolis as a tabloid photographer. That gives me an idea.
My question stems from this, copied from the Wiki:
On the Official Forums, Christopher mentioned that Guise has been seen in art for a very very long time. It has spawned the meme of indicating that new characters in the artwork are really Guise. It has also grown to indicating certain people (Such as Ronway) is actually Guise and so on.
So I'm not crazy and they did not say (unless this was retconned at a later point) that Guise had never appeared before.
Since his bio states he was a low level freelance photographer I doubt he's the cameraman, but he could easily be the guy in hostage situation, who I just realized is the same guy on Fantic's Final Dive.
We know art, text, and card effect don't always sync up, at least not how we might think, and final dive always seemed odd. Why would fanatic be attacking this random civilian? Because she wasn't attacking him. Why is it projectile damage instead of melee (which makes more sense for a full body smash of someone being thrown at someone else)?
Looking at Hostage we have Wraith, AMbuscade, and the guy in the coat. Final Dive is Fanatic, furisously going up, and the same guy without a coat. Picture the scene, AMbuscade (who we know used to be a famous french actor) is looking to cause problems. A Freelance photographer recognizes him, gets into trouble for snapping a pic, and ends up as the perfect bait to draw the heroes into Ambuscade's game. Wraith can't act while the hostage is in danger, but cheap guy, cheap coat. He falls, luckily Fanatic is nearby and rescues the hostage. Meanwhile, without his shield Ambuscade is now a target, hitting the hight hp villain with the Wraith's projectiles while "destroying" a target that was causing a problem by removing it from the field of battle. All while taking the "Final Dive" of falling of a roof to the streets.
All of course, intution and guesswork.