I'll says *Spoilers* for serenity, but I'm not actually giving anything away in this picture, this is just what I think they're wedding would be like. I think it would be interesting if they made another movie and Simon and Kaylee were already married in it. Honestly, mostly I just wanted to draw Kaylee in her Layered Cake
But they ain't rich and she isn't too good to wear the same dress twice, lol, in fact, I think she'd love the excuse to wear it again! I figured they'd get married at Kaylee's homeworld since she's close to her family. That's why I tried to make it look deserty, because most of the backwater worlds are deserty and we know that Kaylee's from that kind of world. So her family is probably behind this scene. Maybe Simon takes on her last name so as to not give her the fugative name. Lol, Simon's parents probably just got a simple wedding announcement like, "hi, mom, dad, still on the run from the law, River's doing better, and I'm getting married to the nicest, happiest girl in the 'Verse, and she has no connections, money or any of that other Pride and Prejudice stuff, but she's smart enough to give me a run for my money... if I had any." lol.
The baby of Zoe's is a concept of RogueDragons, she has a picture here: [link]
if you're wondering about the others, Jayne's supposed to look bored, Mal is grumpy and Inara is giving him a dirty look, heh.