He later made his full debut a little over half a year later in Guardians of the Galaxy, where he hired Gamora to retrieve the Orb, a.k.a. the Power Stone.
The MCU’s Collector first cameoed in 2013’s Thor: The Dark World, receiving the Aether, a.k.a. the Reality Stone, from Sif and Volstagg for safe-keeping.
The eccentric alien was last in seen outside the ruins having a drink with Cosmo the spacedog and Howard the Duck.
She and her new allies brought it back to him, but when Collector’s mistreated slave Carina touched the Orb so she would have the power to escape him, the artifact instead blew up his gallery.