Lots of them would be good but there are some things that make me think that would not be the case, the good ones would be
>Crab
>Leon (Even though there was pyroar but in theory there's going to be a fire horse starter too)
>Capricorn
>Scorpion
There are some that seem difficult but can lead to very interesting choices like
>Libra, a balanced pokemon?
>Virgo, please don't make it a humanlike pokemon in the lines of a fiery gardevoir
>Gemini, Two headed pokemon? Switching personalities? The possibilities are endless
Unlikely
>Aries, at that point we would have got a sheep or goat fire starter
> Same goes for taurus
> Sagittarius seems like the horse again or an archer pokemon besides decidueye, I'm a bit iffy about that
The western zodiac seems unlikely to me
