These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Creator's Pet: Roger Stern really liked Monica Rambeau, the Captain Marvel of The Avengers, and actively pushed her into the limelight. He repeatedly had other characters talk about how powerful she was, men gushed over her beauty, and she was even made chairman of the Avengers for a time. The fans never quite took to her, but she was never really hated. She did develop a larger fanbase once Warren Ellis made her a member of the Nextwave series.
Harsher in Hindsight: The incident of Captain Mar-Vell closing off a leaking container of nerve gas seemed to have been resolved satisfactorily when a friend arrived to administer the antidote, but it turned out later that the gas was carcinogenic which result in incurable cancer that later killed him. So Mar-Vell was essentially killed then, but with a delayed reaction.
I Am Not Shazam: Before the New 52 was set into place, a lot of confusion between DC's Captain Marvel and Marvel's Captain Marvel permeated discussions about the characters. Of course, once the Trope Namer had his name officially changed to Shazam in the Continuity Reboot, Marvel gained exclusive rights to the title.