Destiny will receive a major content release in the fall of 2015.
During Activision's earnings call last night, publishing CEO Eric Hirshberg confirmed that House of Wolves will not be the only thing to come to Destiny this year.
After House of Wolves is released sometime in the second quarter of 2015, another major release will be on track for the fall.
"We have a second [Destiny] expansion on the way, and a major content release coming in the fall," he said. "And a very robust pipeline planned after that."
This could be in reference to the rumoured, and previously leaked Comet release, which carries the title Plague of Darkness. We're expecting this to be a major release with more content than both of The Dark Below and House of Wolves.
More details about it will be surely be revealed at E3 and throughout the summer.