Really, if Elsa was adopted and the Snow Queen is her biological mother, then adoption would be something else Elsa and Emma having in common.
Yes. Spoilers reveal that Snow White and Elsa connect on a powerful level. I believe Snow White will help Elsa to understand how her birth mother could have possibly given her up for adoption, since Snow White gave up Emma to give her her best chance. Also, the article reveals that the Snow Queen has her sights set on Emma for a particular reason. Jennifer Morrison has also revealed something from her past will impact everyone in town. Probably, that past includes the Snow Queen.
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"I'm not bossy. I'm the queen." Elsa