Sobek could be super scary, as well as ammit. A priests funerary chamber where they prepare mummies could be really cool. I designed an egyptian haunt for a theme park once and I we were going to use baboons in it to (I was the guy who liked Congo). I still have a few of the mask molds too.
lets see... room ideas
Funerary chamber- groups walk between bodies on tables draped in sheets a few have the sheets off and you can show stages of mumification. a few of the sheeted bodies could be animatronics and one could be an actor.
Sphinx room- guests are asked a riddle in this room and must choose between two doors the answer to the riddle is a symbol over the door they are supposed to take. If they choose the wrong door, they get bit by an asp. The Asp is really two red sharpies in a latex sleeve that looks like a snake, when they pull the handle to open the wrong door a simple lever makes the "snake" bite them on the hand. The wrong "door" is fake and cant open.
hieroglyphic chamber- easily carved out of foam the walls are full of symbols and drawings of figures. In one section the drawings are life sized and as the guests walk by the figure forms slide in and actors reach through at them. Easily acomplished by making the wall out of 6" thick foam cut with a hotwire. handles mounted in the backs of the puzzle like figure pieces allow the actors to pull them out and reach for the guests, buttons could change the light to a back light when the windows open.
how is that for starters?