For the green band (appropriate audiences) trailer a shot of Natalie Portman's back (that was also used unaltered in the red band trailer) was digitally altered to turn a thong into a more substantial and less revealing garment.
The name of Belladonna, played by Zooey Deschanel, could be taken to mean 'beautiful woman' in Italian. However, belladonna is also an extremely toxic plant (Atropa belladonna, aka 'Deadly Nightshade') used in ancient and medieval times as an aphrodisiac, a hallucinogenic, and a poison. Witches were said to use belladonna to enable them to fly.
There may be a chance of Danny McBride returning to do a sequel. He has stated before the film's release that he'd like to do another movie if he could get a good idea for it.
Q
What are the differences between the Theatrical Version and the Unrated Version?
A
A detailed comparison between both cuts with pictures can be found here.