Thor: The Dark World2013

[Mid credits scene:
Sif and Volstagg arrive in an alien collection]

Carina:
I present to you Taneleer Tivan. The Collector.

[The Collector, looking like an alien Liberace, appears and bows]

The Collector:
Asgardians! It's an honor.

Sif:
You know why we're here. [She hands him the Aether, which he accepts]

The Collector:
Of course. But if I may ask, why not keep it secure, in your own vault?

Volstagg:
The Tesseract is already on Asgard. It would be unwise to keep two Infinity Stones so close together.

The Collector:
That's very wise. I can assure you, it will be absolutely safe here in my collection.

Sif:
See that it is.

[The Asgardians leave]

The Collector:
One down…five to go.