All-fours beast Killer
I've watched enough dev streams to know that creating any Killer that's not humanoid is very expensive, but one can dream. The classic L4D Hunter is a good example starting point. Prowling and leaping at survivors then mauling them sounds very enticing...
The Pig is not too far off with her prowling playstyle (even though it's not really viable and most people just walk), but the only thing that's on all fours with her is her eyesight... If she actually moved at the level of where her eyesight is, I think that'd be really cool and terrifying.
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