One thing we can expect, given how Geralt has been getting sexier with each game, is that nu-Geralt will magically begin looking just like fan-favorite Henry Cavill.
And while probably no one would have a problem with that, it's very important that CDPR doesn't fall for the trap of trading their awesome cast of voice actors for a bunch of famous names – as Hideo Kojima did. That's one of the things they really should keep from The Witcher 3.
The aspect of Witcher 3 that gets less love from fans is its combat, which many say is over-simplified. We, therefore, challenge the team to come up with an awesome combat system, one that's not a direct rip-off from, well, the eldenphant in the room.
Another very important cue to take gameplay-wise would be not necessarily to cut content but to make things more accessible. While this game should stay true to its essence, there are many lessons to be learned from Elden Ring when it comes to not overcomplicating stuff. Witcher 3's menus aren't terrible, but they aren't smooth sailing either. Make combat more challenging, make navigating menus less of a challenge.
CD Projekt Red
As for the story, consider making it a personal affair that's more like the stellar Blood and Wine DLC, less like the main quest from The Witcher 3. CDPR are the ones announcing this is the beginning of a new saga, but this is a pretty established series, so we don't need to be blowing up any death stars right away (again).
Last but not least, we hope that the company will finally provide their devs with the necessary working conditions to complete this project without losing their minds.
Top Image: CD Projekt Red