I hope not! Honestly, giving Anna powers won't make the whole story better. Giving her some sort of "spring" or "summer" power will make the entire movie look cliche, and I really pag-ibig her to stay normal.
She is better off to have no powers, and instead of sequels, I would want a prequel. Giving Anna powers in the movie will make the story's background a WHOLE LOT fuzzier. Seriously, where do you think they got their powers?
About the prequel, the reason why I want a prequel is to know about how Elsa got her powers. I don't think we should bother about the future, which is Anna and Kristoff's wedding. I think we should learn and discover madami about the past, like Monsters University. As loyal fans of the movie, we have to find out the origin of Elsa's power.
Was she born with it? Was she cursed?
But really, do we need a segundo movie to make nagyelo better? I really like it just the way it is, and I'm scared that the sequel might go overboard like Madagascar 2...
This is my opinion, and I hope I expressed myself well to you.