Topic: Monsters
This would be tricky because... well...
The decision not to include a bestiary in Weird Fantasy Role-Playing was because I knew the game was going to be taken as D&D and played like D&D and having a bestiary of any kind was going to facilitate that instead of helping differentiate the game from the standards of D&D-as-usually-conceived play, no matter how odd or unsuitable the creatures.
In creating a game that's a hard break from that mechanically, the assumptions go out the window so I've got a little more room to flex.
First off, nothing from traditional myths and legends. I'm sure someone can draw up their own vampires and werewolves, no need for me to include them in such a thing as this - I'm not approaching this as a fantasy game.
The sort of monsters I'm after are... frickin WEIRD. Not natural to this world. Not just a nasty animal (no owlbear type things) or even "magic animals" like dragons. Nothing that communicates with humans per se. Not even tentacle monsters really... OK, maybe one generic "tentacle monster." (and if the concept works and takes off, the "Lovecraft Supplement" almost writes itself... which means keeping all of that out of the initial release so no using that stuff as an early creative crutch)
Just things that break reality and really hurt your brain thinking about them. Not "monsters" in the usual RPG terms of "Things PCs are meant to fight," but more like "things that completely screw everything up and must be overcome but good luck 'fighting' them."
The idea is each monster should have its own rules and ways it interacts with characters and the world. If it can be summed up in a stat line similar to an NPC, then the monster sucks and is completely unsuitable for the purposes of this game. How do I explain this... OK, you know in Arkham Horror, how you draw the big bad monster at the beginning of the game and the entire game plays differently depending on which Ancient One you're fighting against? That's how I envision the appearance of a Shot & Sorcery monster impacting play. (you'll see some of this approach in the Monolith adventure I'm releasing for Weird Fantasy in the coming months and people are going to bitch...)
But what about animals? Sharks and lions and horses and such are things which should be given stats somewhere, but they'd clash horribly with the general mood of the monsters in this book but if you put them somewhere else like the GM book then there'd be two separate places you're looking for the same sort of thing - stats. hmm.