This has never been verified but I've heard that the plan was to embark on a mummy story after 1897 ended. Instead, DC went with the Leviathan story. As Gothick mentions above, Curtis seemed turned off by the Kharis style-mummy who moved very slowly in the 1940s films. If the rumor about a planned mummy story is true, I'd love to know what the story details were. The Laura/mummy connection would have been absolutely perfect. I really like the idea of Laura having a mummy in thrall to her. Of course, he'd eventually turn on her. Alternately, they could have gone with a mummy in the style of Imhotep from the classic Universal Karloff film. Imhotep starts out briefly as the shambling, bandaged being but gains strength and soon appears as the cunning and deadly Ardeth Bey. Perhaps the writers had a difficult time justifying the presence of an ancient Egyptian mummy in a coastal Maine town. An adaptation of Sir Arthur Conan Doyle's Lot 249 would have solved this dilemma quite nicely m'thinks. It could have worked quite well.
I like the angel idea and I imagine brevity would've made it really special. The angel bit couldn't have lasted too long. Perhaps in a final desperate attempt to end the demonic infestation, Professor Stokes uses an ancient Kabbalistic rite to summon the angel. The rite is a dangerous one and Stokes explains that the very sight of such a powerful being can be deadly to mortals. We are left with a cliffhanger as light begins to fill the room and Stokes and Julia gaze with amazement upon a sight we, the viewers, are not allowed to glimpse. Perhaps we see the angel in the next episode, and if we do, it isn't happy about being summoned. Collinsport is an evil place, and the Collins legacy reeks of curses and wickedness. I don't imagine this particular angel would be sweet and fluffy and ready to lend a hand. I think it'd be angry and full of holy wrath. Still, with Stokes' earnest cajoling, the angel would see the greater good and would help. That's just how I imagine an angel might have worked on DS. The angel would have to be sublime and even frightening in nature.
Other creatures? Many beings from the dark realms of folklore could have worked on DS. Banshees, ghouls (though it might have been a bit too gross if we saw them digging up dinner at Eagle Hill Cemetery), hell hounds and other such "things that go bump in the night" would have been perfect for DS. A golem might have worked though I suspect the makeup would've been a challenge. Vinnie Loscalzo would've had a ball with it though.
Come to think of it, I bet Vinnie would've come up with a GREAT mummy makeup. I can just imagine Alex Stevens in the bandages - his large eyes perpetually staring out from beneath the dirty white wrappings.
~Penny~