I'm making a list of what death traps and background fatalities that we know of so far:
-"Beetle" death trap - if you or your opponent get smashed through the red glass, thousands of insects will eat them alive (I really LOVE this one)
-"Spinning pillars with spikes" - the death trap shown in the trailer where scorpion is kicking baraka into the spinning pillars (beautiful!)
-"Volacano pit"? - there was a very short clip of scorpion knocking subzero from what looks like the top of a volcano, it could be possible that the victim can be thrown in molten lava.
OR it can be a new pit (just speculating here)
-"Tower top"? - this is the stage where subzero is fighting baraka in one of the screenshots.. this is a multi tier stage where you can kick/throw etc. your opponent off onto another platform below, I'm guessing after the last one you can fight on, you can kick them off the tower and see them fall... what awaits at the end? who knows...
that's all for now, list some if I missed any, thanks.