Between the late 30's and the mid 60's there was period in comics called "The Golden Age" that saw the creation of famous figures such as Superman, Batman, and Wonder Woman. Comics were a huge medium and for every hit there were a dozen flops costing only a dime an issue. In the modern day most of these flops have been left behind with no person or company claiming ownership of them.
If you're familiar with any of these obscure characters, which would you like to see make a resurgence? If you're a creative, is there one you would like to work with? Are there any legal disputes regarding character copyright from way back in those days that you find amusing or fascinating?