Not much: a second set of Pegasus Ruins, as well as a Warhammer Fortified Manor I picked up at my first Games Day. They’ve been around assembled and unpainted for a closer to a decade than not.
And, on a whim, hit Home Depot for a mat to make fields, and lucked out in finding one with no print: so a good 2×3 worth of crops.
Nothing magnificent, but definitely serviceable.
I don’t think a 3×3 will cut it for Madicon: we’re going to give a bunch of folks pre-gen’d warbands to push around in a grand melee. I’ve got more terrain than this, but probably not enough to pad out a 6×4 with -this- density. It’ll probably be okay, though.