By Daniel Kline The fast-food giant has welcomed a fan favorite back to its menu, but that’s not the whole story. Very few fast-food items achieve iconic status. Aside from McDonald’s (MCD) – Get McDonald’s Corporation Report Big Mac and Restaurant Brands International’s (QSR) – Get Restaurant Brands International Inc. Report Burger King’s Whopper, it’s hard to argue that any sandwich has reached that level. Sure, the Wendy’s (WEN) – Get Wendy’s Company (The) Report Baconator comes close, but when you think of the true fast-food elite menu items, the list might end at the Whopper and the Big M…