I was struck by the previous comment about lack of an overall masterplan and began searching for anything that might be a "realistic" overview of the project... there is really nothing out there.
This is from the official NEOM site in regards to their "tourism plans" - this is the whole text, everything from their tourism sector page. It doesn't have anything at all specific to say about resorts/amenities/master plan.
All of those things are available to tourists today. It already attracts tourists to its climate, history and geography. So what are they actually building or planning to build?Futurism, sustainability and authenticity will be the key principles of NEOM’s approach to tourism, coupled with a multi-purpose offering where visitors and tourists can experience the tourism of tomorrow. By integrating innovation and developing cutting-edge principles for sustainability, NEOM will offer a futuristic experience that blends the past with the future.
As a region, NEOM is endowed with a rich cultural history, a cool climate, spectacular deserts, splendid reefs and beautiful mountains. This unrivalled natural beauty will be combined with a futuristic tourism model to draw visitors from all corners of the globe, and NEOM will be today a vision reflecting the tourism of tomorrow.
Source: https://www.neom.com/en-us/sector/tourism/