but they will just do the CGI cloning like they did in Rogue On1
Naw, it'll be a puppet. But seriously, I doubt they'd try that with Leia. They'll either have her die or leave her out of episode 9.
Leila dying is the only way nine can happen without her.
force ghost cameo
Hope not. That would be really tacky. Just have her be killed or gone. Yeah it is lame from a story perspective, but the best option at this point. Much better than having a different actor or doing her in CGI.
Forget about it.