Is there a way to add the same photo to multiple items with a bulk edit function?

[fnfgems]

To provide context, we sell vintage toys and collectibles on our online Square website. We have thousands of items in our inventory and the list constantly changes since each item is unique. In other words, we may have 5 of the same action figure but they are all listed as individual items due to the varying condition or whether they have all of their accessories, etc.  

Collectors often ask us for the specific items they need to complete their collection. However, adding all items and corresponding pictures to our website is very time consuming which limits the amount of items we can have on our website. 

The ideal situation would be for clients to be able to search through our inventory to find the specific items they are looking for. They could then contact us to request pictures. To do so, I'd like to create a "Coming Soon" category and add the same image for all of the items in that category which, again, can be thousands of items which are constantly changing. The image would include text letting customers know to contact us for pictures.

Since the same image would be used for all of these items, is there a way to bulk edit and add that image to all of the items in the "Coming Soon" category?

This would save us SO much time and would look a lot better than just a blank photo icon.