system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] What would have happened if Odin had made Thor king before he passed away and Hela was released?

Would Hela have just killed everyone?
gpt
She would have started by trying to kill Thor. She'd still be free, and she'd still want to rule Asgard, and King Thor would be in her way. 

She might be satisfied tossing him out of the rainbow bridge like she does in the movie, or she might want to make sure he was dead so he could never return to challenge her claim.

However, it's possible that when Thor became king Odin would have told Thor about Hela, so he would be prepared to face her. Plus, Hela would have to face Thor in a full fight before she got her army of zombies. So there's a better chance of Thor shutting her down before she can take power.