>>85971266>especially when a real monarchy would require him to actually marry Anna as the queen to achieve any status in this kingdom, where he is a foreignerWell, no. The nobility (we never see any Arendelle nobility aside from Anna & Elsa even though they 100% would have been present at Hans' council, guarding their interests, so it can be assumed that the assorted dignitaries sort of represent the nobility as a whole, both foreign and local) told him to his face that he is Arendelle's future now, and when he was planning to mount another search & rescue mission for Anna they directly told him to leave her to die in the wilderness and assume power directly; "If anything happens to the princess, YOU are all Arendelle has left", and later "Arendelle looks to you now".
Also Arendelle's own military supports him over the royal sisters; they accept his authority and go with him to execute the Queen, and Hans mentions in the dungeon scene that he "couldn't just let them kill you" which might very well imply that the militiamen were so afraid of Elsa after she'd sent her ice monster to attack them they wanted to kill her already there.
So it'd be a clean coup. He'd have a legit right to the throne, because the military and nobility would support his claim.
There's an IRL precedent; In Sweden in the 1800s the nobility and military got fed up with the king being incompetent, (he lost a war and half the landmass (now Finland) with it to Russia) and they simply locked the royal family up and had a meeting where they elected a new king they offered the throne to. The first one was too senile, the other - a Danish prince, like Hans - accepted but died accidentally before being crowned, and the third one, a Frenchman related to Napoleon through empress Josephine, took the throne and his family line, house Bernadotte, is the current Swedish royal family.
Hans would have the legit status of king, because the most influential subjects would accept him as their king.