The only allusion to it being a sequel is the bin full of drones from the original. That's as close to the original cast as it gets.
They couldn't even be arsed to Ghostbusters it up by getting the old crew to show the youngsters how it's done.
You can guess the ending about ten seconds in, and the ending is actually worse than that.
Plus I really don't like Glen Powell. The man looks designed by committee by Hollywood to normalise age gap relationships. He gives me the fucking creeps.