For Kenny to be the new lead character, he would have to be alive. I just don't think he is. Whichever way he goes, he's surrounded by walkers with no exit in sight. There's no way he comes out of that. For those who want to point to the comics and cite Tyresse as a precedent, let me say one thing; that event added nothing to the story. People thought he was dead, they found him the next day just fine, nothing was affected. If he never got trapped in the gym, nothing would be different. They would just resupply and clear out the rest another day.
So, no, I don't want Kenny as the next player character. His story ended. Yes, it was tragic, but at least he died accomplishing something. Either he saves Christa, or he makes peace with Ben by fighting against all odds to save him.
As for using Clementine as a reason for him to live again, that defeats the point of season 1's finale. Clementine is now prepared to live in a zombie world. She doesn't need a guardian anymore. that's not to say that she doesn't need a helping hand or people with different skill sets, but she can take care of her own safety. Kenny jumping in and becoming the next Lee would ruin what Lee was trying to do... although that does seem like the Kenny I know from some of my playthroughs

. But seriously, no matter how you reacted towards Kenny, by the end, he and Lee reconciled to the point where I don't think he'd do that.