Deus Ex Machina in an exploration into a fan remake and modernisation of the original in Unity, redesigning systems and game mechanics to conform to modern iterations of the franchise and the genre as a whole. Not designed to be an exact remake of the original but instead and evolution of it with the intention being at this early stage to produce a reimagined Liberty Island as a portfolio piece.
While not as iconic as the billboard with the Japanese Geisha swallowing a birth control pill, the Pan Am logo is noticeable from the franchise's main image, and for those who have noticed it would make the connection to Blade Runner. It's a fun little tip of the hat to one of the grandfathers of the genre.
While Pan Am Airlines went out of business in 1991, there is still it's parent company, Pan Am Systems with the same logo. I doubt they would have any problem with it's use and would understand the reason for its use, and in any case would just be a small amount of free publicity for them.
This would make sense to just be advertised in NYC. This use can also be extended to billboards and maybe even small posters, but only for advertising it as an airline.