“I feel concerned and worried," last season's champion Jimmie Johnson said.
"But that’s no different than any other plate race. And with all the new things coming along, it’s still going to be a plate race and we still have the same issues to deal with.
"I think it’s a little bit more difficult now," Johnson said. "There are a lot of unknowns that we’ll have to sort out.
"But it’s still the feeling of a restrictor-plate race in my stomach.”