They are being released to 'cash in' on Halloween, apparently. I got to hear the back-story of the theme: each set comes with a monster and a good guy. The monsters are after six crystals, one of which appears in each set. When they have them all, they take them to the vampire castle and unleash evil (or something like that... :-) )
There's no doubting the monsters looked great, although many of them use parts from the collectable minifigs and some appear to have been copied almost exactly (the Mummy and Dracula, for example). However they did appear to be proper figs, as opposed to Chinese ones. The glow-in-the-dark ghost is back, but a new design featuring 'a piece of sheet' trailing in the wind behind its head. The Werewolf head is superb as are the vampire-bat-minifig-thingys in the castle. Other monsters include a swamp creature, 'Dracula's' bride and glow-in-the-dark skeleton horses.
The good guys resemble characters from the Adventurers series and the vehicles are similar, too: sort of 1930s style.
With so many other good themes coming out, I can't see this one being particularly popular, and I don't think I'll be buying it.
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