Looking for help marketing a short film

I’m currently working in a superhero short film script but I want to find a way to get some of the budget back after production. Currently I have a budget of 7000 but I can double it through an investor. However, the investor is only interested if the film can be marketed/ sold/ advertised to where some of the money can be made back or a profit is turned. I’m looking for a platform to release the movie to after production and hopefully find a way to get some money back from it to put towards another film down the line. If further film details are wanted, I can provide them to anyone interested. If you are interested/ able to assist, let me know.