My Disney theory - Elsa is she an adopted child?

As everyone knows, the Frozen film was a worldwide success and became one of Disney movies the most profitable in the history. I myself enjoyed the film as a whole, basic but coherent story, but there's a detail I am certainly not the only one to noticed: during the movie, the origin of the powers of Elsa is not explained. This theory is very dark and dramatic, but rest assured, I'm not trying to break the myth of the film and the childhood of kids, this is just my own theory.

Well, at first, the king said to the trolls that this power has emerged from the birth of Elsa, ok, why not, it's possible, but in this case: why Elsa is she the only one with this power, and not the other family members?
It made me think, and a theory came in my mind, but if it is well founded, it would be such a drama: For me, about my theory, Elsa is not the real daughter of the King and Queen of Arendelle, but she would be a girl adopted by them when she was a baby. How would this be possible?
If the scenario is possible, as in the kingdom of Arendelle, magic and fantasy creatures like trolls exist, it may be that the real Elsa's parents are surely being a sort of witches or wizards with that kind of power too, or a race of humans able to control elements like ice, fire, wind, etc.... and few months after the birth of their daughter, the parents were forced to abandon or entrust her, to protect her from something who was chasing them. In front of the danger, Elsa's parents, for the safety of their child and after demanded advice to the trolls, reportedly met the king and queen of Arendelle, knowing them trustworthy, and for the safety of Elsa, made promised to the king and queen to not disclose anything to Elsa about the truth, and to raise her as their own daughter. The parents explained the problem, revealing the powers of their child, and the potential danger that threaten them.
Seeing the distress of the parents, the royal couple would have accepted, and after that, the real parents of Elsa would have disappeared without traces. Elsa would have grown up in the castle, and her new parents would have found a good excuse to justify the fact that she has a power, without ever revealing the truth, either to Elsa or to their other daughterwho was born few times after, Anna. And at the death of the king and queen of Arendelle, the only two people knowing the truth, Elsa, although being the adopted daughter but the eldest of the two sisters, would have become the new queen without knowing the truth about her true origins. If this theory proves to be consistent for you, and if the scenario of a sequel could going in this direction, it would mean that Elsa would discover the truth about her past and would, with the help of Anna, Kristoff and Olaf, go in search of her real parents, in the hope they are still alive somewhere. Or to be more dramatic, Elsa could discover the ruins and other traces of the past about her people,an ancient race of humans able to use magic, and whose her parents were the last members still alive, making of Elsa the last of her people. This scenario could explain the origins of the powers of Elsa, and she could also discover the mysterious threat that forced them to abandon her when she was a baby. And what could be this mysterious threat that chased the real parents of Elsa? Well, like ice being an element could be manipulated, other forms of magic manipulating other elements may exist, and it could be a very dangerous and dark threat, as a powerful and mischievous mage, controlling the fire for example and enemy of the ice mages, that could be the next enemy of Elsa and a new threat for Arendelle. And how Anna would react in discovering that Elsa is not her real sister, and vice-versa?  Knowing Disney, I don't think they will dare to do such a scenario like this, because for them, it might be too dramatic and dark for little children, but I admit a scenario like this would be great.
And it would also be an explanation for the fact that Elsa grew up with more and more trouble controlling her power, cause she has not grown with her mages parents, so she was not prepared for control it.
Anyway, this is only a theory, my theory that I like. So what do you think? Elsa: adopted child, or not?



Mathias, the Killmaster
Fire and Blood \m/