This discussion may contain spoilers!
As much as I want Kenny to come back, I don't think he will. I think they are just going to replace Nick with Kenny. There are some similarties with both of them. Nick only has his uncle and when he ''dies'' he starts drinking and will probably be an emotional wreck, just like Kenny after loosing his family. He also has that same attitude that Kenny had, if you decide to treat Kenny bad.
Also it is very unlikely that Kenny was able to escape that scenario.