We will rejoice.
We will rejoice because our God is in control. We will rejoice because we prayed that the right family would be chosen, and we know God hears our prayers and doesn't make mistakes. We will rejoice because we had the privilege of praying for children created by the Most High God. We will rejoice because the Word of the Lord does not return void, but accomplishes the purpose for which it was sent.
But mostly, we will rejoice because Scripture tells us to rejoice in the Lord...always.
And, again, I say...