Backstage News: John Cena Or Triple H Heel Turn Planned?
Cena turning heel would be a risk because of his popularity with kids and everything else, including merchandise. It also appears unlikely after Money in the Bank that he is turning heel. It's almost confirmed now but never say never.
Triple H has wanted to turn heel for a few years now but with injuries to him and his co-workers, they haven't had the right time to turn him. This appears fairly likely but nothing is confirmed. WWE doesn't have long-term Nexus storylines in place yet. They are going on a week to week basis these days.