As Sapotis has revealed there to be 12 more Zodiac Miraculous there's so much to discuss; their powers, their kwamis, their tools, their superpowers and, most importantly, their holders. There are some important ideas to remember before getting into theorising. 1) the symbolism of the animal which the Miraculous is based upon infoms the Miraculous's abilities (Foxes are animals that symbolise trickery and mischief and thus the Fox Miraculous grants the power of illusion) and 2) the theory that the Miraculous go to people who have something to learn from possessing said Miraculous (Adrien, a boy who has his life entirely micromanaged, finds freedom in the destruction abilities of the Cat Miraculous).
Dog - Dogs typically symbolise loyalty. It appears to be a sort of collar or choker, fittingly. Given that wolves, animals form the same family as dogs, are pack animals, it's possible that the Dog's power has something to do with creating a "pack", possibly mind controlling civilians into forming a small army to assist the holder. The Dog may go to someone who is a lone wolf, someone who operates on their own and thus learns to work with and as a group.
Ox - Oxes symbolise strength. It appears to be a sort of ring, possibly a nose ring which would make sense as Oxes are known to wear nose rings. The Ox's power is possibily incredible strength, if only for five minutes. The Ox may go to someone seen as "weak", not necessarily physically maybe mentally or emotionally and with the Ox finds a sense of inner strength.
Pig - Pigs are well-known to symbolise greed and gluttony but also compassion. It appears to be a bracelet with five pearls attached to it, obviously the countdown signifiers. The Pig may go to someone who is too selfless or self sacrificing and with the Pig is able to even out their selflessness with some greed.
Snake - Snakes have a wide symbolism; fertility and rebirth, poison and medicine and vengefullness and vindictiveness, a la the biblical serpent. It appears to be a cuff/wristband/bracelet. Interestingly in the show's original animatic there was the Snake Miraculous, or a variant of it, depicted as an ouroboros, a symbol of rebirth and cyclicality possibly informing the canon Snake's abilities. The Snake could possibly go to someone who is "too nice" and the Snake helps to balance this.
Monkey - Monkeys also have wide symbolism but prominently occurring is mischief, playfulness and fun. I honestly have no idea what the Monkey Miraculous is meant to be. As Astruc has confirmed that Sun Wukong was a previous Monkey Miraculous Holder we can infer that some of the legendary Sun's abilities inform the abilities that the Monkey grants. Sun Wukong could shapeshift into different forms and could turn strands of his hair into clones of himself: these could both link into the idea of mischief. The Monkey may go to someone too austere and possessing the Miraculous helps them to have more fun and give into a little mischief.
Horse - Horses symbolise nobility and freedom. Not visible.
Goat - Goats symbolise determination. The Goat comes in two pieces, like the Ladybug, and is possibly another pair of earrings.
Rabbit - Rabbits symbolise comfort, vulnerability and abudance for...obvious reasons. Not visible but blue for some reason. Given the fact that Rabbits breed very quickly and very much, the Rabbit's power could possibly be cloning (although I'm convinced that the Bee's power is cloning as well). I could see the Rabbot going to someone too "hard" and brusque and the Rabbit helps them to soften up.
The Tiger, Dragon and Rat have such varied meanings and symbolism that its tricky to place exactly what their powers could be which is a shame because the Tiger and Dragon are the ones I'm personally most excited for (I just love the deep purple colouring of the Tiger kwami!). As for the Rooster, I couldn't find anything definitive on its symbolism.
What do you guys think?