Peterson will lock horns against Johnson, who is deemed the best wide receiver in the NFL, when the Detroit Lions travel to face the Arizona Cardinals in week two.
"That's all I've been thinking about," Peterson told ESPN.com. "I just want to go out there.
"I've been preparing well all week. I believe I have a good feeling of what he wants to do."
Peterson was drafted fifth overall by the Cardinals in the 2011 Draft.