I was hoping the same thing but it just doesn't make sense. Out of all the trio pets all had one u had a puzzle of sorts to find it (Orokeet, Crimson Rakling, and Taunlet) and one that dropped from new content (Orosquab, Orochick, Taunta, and Midnight Rakling). Since there is no new content I believed it was only safe to assume that the drops would be from previous content.