The character played a role in the 2007 crossover comic book event Annihilation: Conquest, and became a member of the titular team in its spin-off comic, Guardians of the Galaxy.
Thanos destroyed Pip's mind, but Adam was able to absorb Pip's soul into the Soul Gem (killing his mindless body, but restoring full mental function to his soul), reuniting him with the spirits of Gamora and eventually Adam Warlock in Soulworld within the Soul Gem.