These two aren't modified at all - just two straight microheroes I'm borrowing to represent a couple of my upcoming picks.
Falcon: King Katar Hol of the Aerie, Emperor of the Savage Land
(Who is basically just Hawkman. I kinda wanted to put one together with one of his more... unfortunate... costumes and a different helmet, but it was a big pain in the ass. I may try again tomorrow, though.)
Johnny Thunder, AKA John Henry Irons
I really wish I could have found a better Zzzax to use - one that showed how big he is. But this one will do. My version of John Henry Irons was transformed into a nuclear plasma monster when his experimental ARC reactor blew up. Now he wanders the world, hunted by the military, and tries to do some good while searching for a cure. If I were a better person, I'd make a micro of him in human form as well.