Question two - What classic film would you nominate for a remake?
That would be none.
Casablanca without Bogey and Bergman
Wizard of Oz without Judy
Gone with the Wind without Viv Leigh
Arsenic and Old Lace without Cary Grant
All about Eve without Bette Davis.
Just a few off the top of my head that I can think off that just wouldn't have the same chemistry without the stars, wardrobe, scenery and co-stars.
A recent re-make although not a classic is a point in question.
"Clash of the Titans", vintage l981. Watched this with the boys in the comfortable old Balwyn Cinema and it wasn't a great story but it was a pretty movie to watch. Stars Harry Hamlin and Judy Bowker were both pretty even the flying horse was pretty. The Kraken wasn't but this was before CGI and we watched what we got. The scenery and the wardrobe of the rest of the cast was beautiful, colour was spectacular, Ursula Andress glowing but then she was playing off set with the pretty Harry. I enjoyed all of it.
Not so much the remake with Sam Worthington whose Aussie accent could have decapitated the Gorgon with a word not a sword. Okay so the world back then probably was grey, dirty and gritty but trying to watch it was like watching a Grand Final through a snow/hail/rain/thunderstorm. It had less of a story than version 1, more gore, more hairy men and CGI monsters though. The female 'sacrifice du jour' I can't even picture, but Judy Bowker I still remember from version 1. Fortunately I didn't pay out money to see this but watched it on TV and I doubt it would have been any better on a large screen. I didn't mind Sam in Terminator Salvation but couldn't have someone done something with his strine in this film.
For the last word on remakes, George Lukas regrets playing around with the first StarWars film and putting in more CGI characters just because he could, it added nothing and annoyed us, the devoted fans of the original.