I don't know what McDonald's would want to do for a PG-13 film but Burger King had two different toy promotions for Episode III, which was a PG-13 film that featured Anakin Skywalker turning to the Dark Side, murdering children, brutally cutting down enemy leaders and being burnt almost to death as he screamed in agony.
Burger King might have slightly different standards for which films they'll promote in their restaurants and with their food, but I could see at least one of these two chains having at least some The Force Awakens toys available for purchase.
It's a Disney thing. They no longer do any fast food toy tie-ins, and haven't for almost ten years - now just Subway (since it's sorta healthier I guess) with the little bags, which sometimes come with a sticker sheet, trading card, etc.