They should remake "The Magnificent Seven" again, except this time make it interesting, and good, and have any actor not in the remake. Oh, and not make it so slow and boring you fall asleep.
I just watched Highlander for the first time in like 20+ years. God that was an awful movie. It is legitimately hard to believe how terrible that movie was. But the concept was interesting enough to spawn like 40 sequels and a TV series. I'm sure they could reboot that into an actual cool movie. Just make sure to throw away all of what's gone before, and don't make a Scottish highland clansman use a katana.