You’ll receive a SIVA Engine and the Exotic quest Channeling the Corruption.
The Wrath of the Machine raid, an ARG and a lengthy Exotic quest all resolve in Outbreak Prime, a new Exotic pulse rifle to fill out the A Life Exotic entry in your Record Book.
Serious kudos to the Destiny community, specifically the Destiny and Raid Secrets subreddits, for solving this hugely involved mystery.
The second step of the Channeling the Corruption quest has multiple requirements, but it’s not as straight forward as it looks.