But what about the video file of the story in the cinema room? The quality was quite poor, I hope we can expect a huge improvement on that.
Realistically, the best you could hope for in "remastering" the videos will be a melding of old and new. Any graphics in that video, or anything computer generated, can be remade in a higher resolution, so theoretically we could see something in 4K. The tricky part, however, is the source video for live action scenes.
It's possible that sections were filmed on 16mm for the TV advert, but it's much more likely that they were filming on DigiBeta (a standard definition digital video format).
If sections for the TV advert were filmed in 16mm, and they've retained the original prints, they could scan them in at a higher resolution and re-use, or re-edit them to create a new HD or 4K video (with film being analogue there's a fair bit of room to manoeuvre).
If, as I believe, all of the source live action video footage is filmed on DigitBeta, you're not going to be able to upscale it to a satisfactory standard. Its resolution will be 720 x 576 anamorphic pixels, it will look like trash if you try and blow it up to 3840 x 2160 square pixels. I don't care about whichever prosumer tool you've seen which promises 4K upscaling, I don't care what you think AI can do, it is entirely a product of its time and will remain that way.
One option would be to film new live action sections for the videos. They could attempt to recreate the legend video shot for shot, but with digital cinema cameras. This would effectively "future proof" for a while. It entirely depends on how far they want to go with this.
The likely outcome, I think, is this:
The line queue documentary, shown on the goold old CRTs, wil remain the same. A documentary is a documentary, they are products of time, if anything the ageing looks and feels just adds to the legend and story at this point. It looks like a BBC documentary shot in the late 90s.
The cinema room video will be remade from scratch, but will retain the original voiceover. A shot for shot remake is possible, but unlikely. It'll be mostly the same but won't retain some of those turn of the centuries wonky, on the floor, MTV camera angles. Their only other option is simply to keep the original as it is and leave it alone. There's nothing to be done to it to "remaster" it.