Oh, if LB was ever made, I know I'd cry uncontrolably...
& then go see it again the next day and have another good cry.
Repeat the cycle about 5 more times.
But, yeah. It's sad in a happy way.
I mean, it's sad they're "gone" well, from our plane, but they're happy in Narnia, which is truly perfect. So, really, we shouldn't be sad... Even though it's in our human nature that death=sadness.
Concluding, yeah, It'd be sad. I'd cry for a long time after seeing it. But, a few tears shed is worth telling that story.