Riri Williams
I sincerely don't believe the Iron man franchise has recovered from that and Riri really never found a footing due to the botched introduction. I really don't know who to feel more sad for, the Iron man fans who had to sit through sales poison or Riri fans who are trying their hardest (and I truly admire that) to get jaded readers to pick the new series up.
And to be completely honest, it's kind of a failed experiment along the same lines as Cindy Moon (Silk). You're really not going to see Riri in anything unless it's for a diversity quota and all of her game appearances are pay-walled or she's a clone of Iron man. Essentially meaning that nobody who isn't even curious or willing to shell out the money is going to care. Basically her comic and appearance in Champions has to do the heavy lifting and Champions stands risk of falling on the chopping block.