Rockin’ Thunder, the rock ‘n’ roll music festival that debuted this summer at Edmonton’s Exhibition Lands Racetrack, will return next year with headliners Creed and Three Days Grace. “After an incredible inaugural year, we knew we had to keep the momentum going,” said Troy Vollhoffer, festival CEO, in a press release Thursday. “Bringing Creed and Three Days Grace to Edmonton felt like the perfect way to keep building the festival into something truly unforgettable for Canada’s rock community.” Three Days Grace will perform on Saturday, while Creed will close out the two-day festival on Sunday. The rest of the lineup has not yet been revealed. Tickets are on sale.