Human-Wraith Hybrid

The Hybrids were a new engineered species that began to appear within the Pegasus galaxy

Background
The Hybrids were a further step in the former Wraith Michael's experiments in creating his own species. After his first "crude" experiments that created bestial Iratus bug monsters, he refined the use of the Retrovirus to create a more perfect balanced being. One that merged the qualities of a Human and a Wraith allowing them the strengths of the latter but lacking the one weakness that would be the downfall of the Wraith; the need to feed. This was part of his plan developing a new race that would become the dominant force of the galaxy.

Unlike his previous experiments, the Hybrids were created through the forced conversion of a Human through a lenghty process that would turn them into a member of this new species. This was done at various laboratorys that were spread across the galaxy on dead worlds. These Hybrids were unquestionably loyal to Michael even if they were forcibly converted as he placed genetic triggers that made them suspectable to his influence. Despite his progress on the Hybrids, they were still incomplete and Michael was making a number of steps to perfect them which he believed he could accomplish through Teyla child. 

Alternate Timeline
In an alternate future where Colonel John Sheppard disappeared, Michael took Teyla's child and perfected the Hybrids and began an open war against the Wraith. Using the Wraith Civil War in order to weaken the various factions, the Hybrids would attack the weakened Wraith eventually defeating the species. Once this was accomplished, Michael used his genetic conversion process on the stronger Humans of the Pegasus galaxy while the rest were exterminated.