Startup Idea : Replace an old Image with a new one

My idea is an image host, that allows to replace the old image with a new one. The URL stays the same, so wherever you shared your old image, you can see now the new replaced one. You could even set the time to change, or to change back and forth Or you could use an additional tiny image (1x1 pixel and invisible, so it doesn't distract). And when the time is right, you can replace this tiny image with with a new one of your choice. Even Links can change and redirect to a new site There are some services who can redirect a link and change the destination afterwards like http://tiny.cc. So if you combine both, you get a great idea You could use it to: - advertise - Keep others updated So what you think about it?