Why would stromboli stuff be sold out next weekend 
It's a Superbowl party weekend, and ingredients used for appetizers will be big sellers as people make stuff to serve at their parties.
they may not make stromboli, but they may make their own pizza, or mini pizzas or other things with the dough or pepperoni. The canned dough is used for a lot of recipes.
one year I waited until the day before, and had to run around to different stores to find the stuff I needed.
One Halloween I found this video showing how to use the dough to make Skull Pizza Pockets.