They should remake classic B movie sci-fi titles with modern FX and CGI.
Them!
It Came From Outer Space
The Man with the X-Ray Eyes
Plan 9 From Outer Space
Etc.
Just avoid the precedent of terrible remakes...
Neo's The Day the Earth Stood Still
The Shape Of Water = Creature from the Black Lagoon
And while not a movie, I'd like to see some Twilight Zone episodes with modern FX wizardry. Keep the black and white aesthetics, have a new Rod Serling for the intros (or CGI him like Tarkin), and then go wild, baby.
Nightmare at 20,000 Feet
The Monsters Are Due On Maple Street
To Serve Man
The Invaders
Time Enough at Last