• Some poster or something from Justice League (2017)
• Some promo shot of Rodney McKay
• Referencing events from Stargate Atlantis S3E14 "Tao of Rodney"

In case it was not obvious, Jason Momoa (Ronon Dex from Stargate Atlantis) later portrayed Aquaman in Justice League (2017) https://en.wikipedia.org/wiki/Justice_League_(film)

Bonus: The original dialog from the episode