When a fast-food restaurant discontinues a menu item, it's not necessarily gone forever. The co-creator of the Adult Swim show "Rick and Morty," for instance, once got McDonald's to send him a bottle of its legendary (and long discontinued) Szechuan McNugget sauce. During the pandemic, McDonald's shelved some of their healthier items (just in time for most of us to want to shed our extra pandemic weight). Examples like these beg the question: If enough diehard fans call for the return of a fast food item, will restaurants oblige? Here are some candidates for resurrection.