Well from what I heard, I think it was confirmed. He actually said it in the movie before “Love is an Open Door”. He was ignored by all of his brothers. He has 12 older brothers, and he was the youngest and some of his brothers ignored him for 3 years. He was what that call “the bastard son”, he wasn’t close to his throne, so he had to marry into the throne somewhere. He probably wanted to go to Corona before, but I am guessing he heard that Flynn married the only princess there. Then he went to the kingdom that was the closest. I don’t know much about Hans but I wish I did.
There were also headcanons that his mother abandoned him or even died, and before she died, she hated him them. There was a photoset on here on tumblr somewhere where it was another headcanon that Hans’ mother said “Oh Hans, if there was only someone out there who loved you” and he goes “mom?”… I don’t know but these stories, and even his known backstory is heartbreaking.
But nonetheless, he shouldn’t have tried to kill Elsa. Or Anna. That’s the only thing I don’t like about him, but his story is what gets me.
Hans had fire powers?! I haven't heard that theory! Can you explain :)
Well it is actually a headcanon but I believe it it true. Take a look at Hans at EVERY part of the movie. The ONLY time he didn’t have gloves on in Frozen, is when he was burning out the fire in the scene where he betrayed Anna. He had gloves in Love is an Open Door, in the Summit Siege and in every other part of the movie except for one. Watch this. (Sorry it took me a while to gather photos but this is my conclusion)
Hans with gloves on
Hans with no gloves on (just one glove off but still)
And to add to it, think about this, after he dealt with the fire, HE PUT HIS GLOVES BACK ON and also after he touched Anna. As the pictures shown above.
Thank you for asking and I hope this helps you see where I am coming from anon! :)