Combine the lemon-lime soda (or champagne) and the cranberry juice blend to a clear punch bowl or container. (Note: If you're making this punch a head of time, I'd wait and add the lemon-lime soda or champagne right before serving.)
Add 1 cup sugar and stir until combined.
Add the thawed juice concentrates.
Taste. If it's a little strong for your liking, add some water. I'd suggest anywhere from 1-3 cups. Keep in mind that if you are going to add ice (which I suggest), then that will help dilute it too as it thaws. So, don't add too much water!
Add ice (if you prefer) and then garnish! For the garnish, I like to add a bag of fresh cranberries, lemon slices (with peel) and fresh rosemary sprigs! The rosemary sprigs are the best and that is what makes this punch Christmas-y!
I highly suggest not omitting the garnishes - they are what really make this punch pretty!