pets were confirmed. that's all i know so i will say what i want. pets should be able to die and their supply should be infinite. there should be land pets, swimming pets, air pets which are distinguished by battle and scout pets. battle pets are self explanatory... keyword: battle. scout pets actually allow you to control them they will be small, stealthy but, with low attack damage and HP.
battle
land: dog/cats
water: snake/eel/
air: battle eagle/ raven
scout
land: poisonous spider/scorpion
water: poisonous snake
air: pigeon
i think the advantages and disadvantages of air, water and land pets are self explanatory
water is restricted to water. air pets are quicker, more evasive and have a birds eye view but, with weaker attack speed.
idk about how many pets you can have at a time. there should definitely be a pet daycare/ ranch for your pets. maybe one scout pet and one battle pet?
scout pets may be contained within your clothing/ armor. they are weak and would die in regular battles.