Excited for all of them, but the idea of fighting undead-like monsters on Venus just grabs my attention the most. The alters with what appears to be dark magic rolling off of them gives off a very unnerving feeling of what to expect and that's the thrill any adventurer looks for. After facing something like that, you're relieved to be fighting normal aliens again. That's when you know the designer did good. That's if they are as scary as what I expect them to be. The Hellmouth on the moon does seem very interesting though, reminds me of the Orcs in the Mines of Moria; giant pit.