I still need to figure out which theme for the main yard, but I know what I need to add to my brother's yard and grandmother's yard for next year.
Brother: Cemetery theme
7 more regular tombstones
3 (probably) larger monuments
hearse
sign
fencing
caretaker figure
groundbreaker
Grandmother: Pumpkin Patch theme
20 more pumpkins - various sizes and colors
3 scarecrows - varied styles
crows and other patch-friendly animals
better lighting system
signs
trick-or-treater figures - still working out the details, but based on those Giggle Buddies props, only better looking