Painting for a church: Our Lady of Guadalupe

I am getting married this summer at St. Francis de Sales in NYC and was excited to hear that the church was hoping to have a painting of "Our Lady of Guadalupe." I have always wanted to donate a painting to a Catholic church and I decided this will be the perfect occasion.
"Our Lady of Guadalupe" is the patron of Mexico which makes me doubly excited about the painting since my fiancee is Mexish (Mexican and Irish descent).

In any case, I recently I started the project and below are a few sketches for the painting. I will be posting periodic updates with new images.