https://www.doomworld.com/vb/doom-2016-general/86076-doom-alpha-code-strings-new-info-spoilers/
 
 Some of these are (check the full thread for more):
 >Archvile confirmed
 >Spider Mastermind confirmed
 >Automap confirmed
 >Shitton of menus
 >Game tracks kills/secrets 
 >Game functions in chapters, like DOOM 1
 >There's 5 chapters total
 >New Demon types
 >"Aqua Marines, and Hell Marines"???
 >Mutators for custom multiplayer matches
 >One of these mutators allows Strafe Jumping
 
 And check page 3 for weapons showcase, and another webm where the player moves around and it seems to go faster than previous previews.
 
 Now I'll just wait for when the game'll be released.