The Emperor returning after being 100% dead.. be like..
Die Hard - Hans survived his fall and has been in a high security prison not earning 20% until his brother Simon's son (Daniel Bruhl) breaks him out to return in Die Hard 6:The Fall and Rise of Hans Gruber (played by Alan Rickman CGI)
Lethal Weapon - Gary Buseys iconic Mr Joshua is back! He's bad! and he's mad! (oh how? well the bullets at end of LW1 merely wounded him and in LW5 he's just been released from high security prison with one thing on his mind..the death of Riggs!)
Scarface - Tony hands himself one of them first-class tickets to the Resurrection..by having survived the point blank shotgun blast to the back. And awakens after a 40y coma and promptly goes about resurrecting his drug empire. Pacino obviously returns alongside DeNiro as his new druglord rival in Scarface Part II: Resurrection
Robocop - just give him his fuckin' phone call, because Clarence Boddicker survived the fatal neck wound and is back to get revenge on Peter Wellers Robo in the long belated 4th instalment (or 5th if you count the crappy remake). Kurtwood Smith dons maths teacher spectacles once again
Total Recall - See You The Party Richter! This man always keeps his promises..returning with cyborg arms to extract a long gestating vengeance on nemesis Doug Quaid. Michael Ironside returns to the Recall universe alongside Arnie and.. Sharon Stone?!.. for Total Recall 2 (what remake?)
Alien - forget Ripley & Hicks coming back with no explanation other than 'cuz the fans wanit!' this sees the return of the true villain of Alien.. Ash.. only the twist being hes not really returning.. but appearing for the 1st time chronologically in Scotts 3rd prequel at the end when the Company uploads the destroyed David into another android that looks remarkably like a 1979 era Ian Holm ..yes thats right. David was secretly Ash all along!
Raiders - its beautiful! for 80y old Paul Freeman. as Belloq returns as the villain in Indy 5 , resurrected by the dark force of the Ark.
Batman - The Joker Speaks! Nicholson is back as the clown prince of crime in the 3rd Burton/Keaton bat movie with no explanation other than the joker saying 'its complicated'
Superman - The Return of Zod! no not the overly angry CG suit wearing one nobody liked, but Terence Stamp topping up his pension plan as a deaged to 1980 General Zod - defrozen from a glacier like Captain America after Superman chucked him into the endless icy abyss at the end of Superman II.. and now returns in the long belated Superman V but just titled 'Superman' (Warner's be like pls forget Returns.and MoS. and BvS..and JL.. ) - 'Come to me son of Jor-el! Apologise before Zod!' (also starring CGI/deepfake 1992 era Christopher Reeve)
Star Trek - Khan Returns! (not the fake Cumberbutch khan but the 'real' khan via CGI/deepfake 1982 Ricardo Montalban). Resurrected on Genesis immediately after the events of Star Trek II, captured by the romulans, and held in cryogenic freeze for over 100 years. He breaks free to inflict his wrath upon the federation once again.. this time going up against Picard.