The idea of big monsters destroying buildings, and destroyable buildings, sounds exciting; however, it seems to me either the monsters have to be pretty big to be bigger than the buildings they destroy, or the buildings are going to have to be pretty small.. or they'll be somewhere in between, but either way that means that it's likely neither monster nor buildings will be in a proper 28mm scale for use as either wargaming or rpg terrain/monsters. Since it seems unlikely I'll find many people to play the game with, the only reason I would get them is to be compatible with the other activities listed..
But random, meh. Maybe if they have 'building' boosters and 'monster' boosters, at least if I wanted some terrain I'd know I'd get something. But if they're all mixed together, that'd make me angry.
however, I admit I used to get a bit of a thrill out of opening a booster or two of D&D minis (although that wore off pretty quickly, too..).
/ali