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.
All of the news broadcasts the player encounters on TV's and bulletin boards should all be themed around PICUS for continuity. Except that Eliza Cassan now appears to have gracefully aged +25 years.
In Paris, broadcasts animations should have French writing, and in Hong Kong they should be Chinese. Both of these locations should be dubbed, because MJ12 wouldn't want the public realising that Eliza is broadcasting in all languages fluently and simultaneously.
Another point would be that you can allude to various actions the player and other organisations have been taking as the game progresses, giving the player a stronger sense that the organisations are living, active entities with objectives and scope that makes the player feel like a smaller piece in the interactive machine of vying corporations and their interactions with each other.
Political and social issues of levels the player is working through could be alluded to as well, such as martial law in NYC, Silhouette attacks and results, Shutdown of LaGuardia Airport, flights being diverted etc etc