I could maybe see some sort of watchdogs esq hacking multiplayer, where rather than actually invading as a hacker and crouching in a corner close enough to the player to "hack" them, you control police scanners, gang networks, traffic bollards, vehicles, etc. with the goal of killing the player. Obviously with some sort of opt in to the invasion list. Maybe a choice greenlights you for execution until some condition is met, or a high risk escort mission that rewards a bonus for maintaining network connection throughout.
But if it's an FPS style multiplayer it would be a complete waste of effort. The genre is tired and full of strong competitors who have been making that sort of game for decades and long ago sacrificed any semblance of a single player campaign. Not to mention that CDPR are not experienced in the genre or architecture required.
The Game Awards' "best multiplayer" went to an RPG this past year, which was also most people's game of the year. It's not Mass Effect 3's horde mode; it's literally just taking the multiplayer element of the tabletop experience and putting it into a video game. In 2077, by way of having no control of any kind of squad, they essentially made it so that the player character was always a Solo class. An eye toward having a squad or party of some kind would lend itself quite well to slotting in additional players and other classes. I would be happy to see more RPG developers consider that this should be the default form of multiplayer in any video game adaptation of the genre rather than whatever BioWare has done since Neverwinter Nights.
I'm so tired of the AAA hype machine. Who cares, since this game is years away from a release and probably 3-4 years of post-release patches from being decent.
I thought CD Projekt would have learned from Cyberpunk's incredibly prolonged marketing campaign and it's remarkably shoddy release but I guess not.
If it's optional, I don't mind if multiplayer is being considered. However, I want them to focus fully on making a rich single-player experience (my personal preference for games) as a lot of games that just shoehorned in multiplayer were lacking in the single-player experience. My interest is always diminished by the mention of multiplayer, I will take a wait and see approach when this sequel is released and reviewed before forming a real opinion.
Honestly, I can see the Borderlands-esque dungeon buildings in Dogtown (Phantom liberty expansion), almost like a proof of concept that never got polished and was added as an afterthought.