(This task is an outcome of T131435.)
Last year Wikimedia Deutschland developed a feature for Wiki Loves Monuments to have Commons uploads to almost immediately appear on the lists
At the end of the upload wizard process, users could select which image they just uploaded to be added to the list ; or if there was already an image for it, to replace the existing one. A bot would take care of it.
This is a very nice feature, and other countries would benefit from it (although some would want to opt-out).
How much work would it be to have it for other countries?