Truth be told, the undead are the OPPOSITE of druids in every way shape and form as they are representative of death, which is the opposite of life (obviously) where druids are on the scale. Undead druids are likely to never happen, same with undead paladins.
Spiders are not cats. They are not adding any version of Cat Form that doesn’t use the actual cat rig because that specific form uses its teeth and claws for its attacks. This is the third or so time I’ve seen someone suggest a non-cat model as a “Cat” Form customization, and it doesn’t make any more sense now.
Not sure how Forsaken and ghost arakkoa are connected in any way, plus it wouldn’t make much sense for them to be able to shift into a noncorporeal form and back, but then again, the concept of Forsaken druids is oxymoronic enough as is.
All the Aquatic Form options we have now are for completely waterborne animals (seals, dolphins, etc.), which frogs do not fall under.