According to the latest article at GameInformer.com on Sucker Punch's new PS4 title "inFAMOUS: Second Son", they pulled data from PS3 player's trophies from inFAMOUS 2 to see how players wanted the series to progress.
So, 78% of you complaining about having a new hero instead of Cole being in this only have yourselves to blame. I went with the evil ending first, so I'm with the 22% who did my part to keep Cole around. Balls in your court, suckers.“When we got done with Infamous 2, we had given players this choice of whether or not they wanted to heroically sacrifice Cole or keep him alive at the expense of the human population,” says game director Nate Fox. “The game shipped and we started seeing trophy data, and 78 percent of players decided to sacrifice Cole and have him die. We wanted to honor their choice so moving forward we said ‘Let’s make a new hero.’”