Sorry for the hugely delayed response. Medium does a terrible job of flagging comments so I’m just getting to this.

Actually, I’d go for options C, and create a landing page without any developer or PPT presentation. I wrote about it here:

https://medium.dave-bailey.com/the-smart-way-to-develop-new-product-ideas-2c5072048a0

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store