I often wondered about King Tut from the 60's TV series.. Sheeesh what a weird character. Bahahaha
The penguin needs to be revamped a bit. Instead of being a retard lover of birds with magical umbrella's maybe he could just be a cold blooded Gangsta. "Ozzy the Penguin Cobblepot... Why penguin? 'Cause he's cold as ice and he always wears a tuxedo" Something like that. I mean the real life Gangsta "Sunny Black" was called that name because he dyed he's hair black. "Sunny Red" wore red shoes. These are real life Gangsta's, so Ozzy the Penguin could also work.
Don't know what to do with Riddler though..... He could work as a one off serial killer. Something like "The Riddle Serial Killings" or something like that. Not an ongoing villain, who is a genius and wears green. Too ol'skool comic feel. Needs to be re-looked at.