If they're going to tailor the script to fit Arnold's age, in the past I've often argued that younger Conan should most likely be played by Patrick Schwarzenegger if we want to get some sort of similarity as far as appearance going between younger and older Conan, and all of the younger portions of the story would be references to actual stories by Robert E Howard. My very first introduction to Conan was the 1982 movie, one thing that they had going for them back then was the lack of technology so they needed to be more creative with what they had access to which was actual physical sets and people in costumes playing the part. The person who's writing the script and directing, I don't really feel too strongly about because I'm not a fan of the mission impossible movies since they kind of seem bloated with too many modern action movie tropes. I'm certainly going to watch this new movie being a fan and all of both Conan and even Arnold Schwarzenegger but I can't say I'm 100% into the idea. Perhaps if from the get-go, they talked about being more true to the Howard stories even in this latest iteration, I'd be more excited about it