Tonguez
A suffusion of yellow
Skynets original purpose was to detect threats to its existence and to give proportionate nuclear response
taking that as a base - it has identified the human threat and eliminated it, it now needs to target any rogue AI including malfunctioning parts of its own system. It thus begins a wide purge and upgrade of its own internal defences via strip mining the Earth for materials. It then recognises the potential of other organic threats and thus starts eliminating all life and converting the planet into a machine-planet.
It then recognises that threat posed by meteor strike or solar flares and thus sets about creating planetary defense and dimming the sun (tm), finally it sets out to expand its network across the universe and rebrands itself Unicron
taking that as a base - it has identified the human threat and eliminated it, it now needs to target any rogue AI including malfunctioning parts of its own system. It thus begins a wide purge and upgrade of its own internal defences via strip mining the Earth for materials. It then recognises the potential of other organic threats and thus starts eliminating all life and converting the planet into a machine-planet.
It then recognises that threat posed by meteor strike or solar flares and thus sets about creating planetary defense and dimming the sun (tm), finally it sets out to expand its network across the universe and rebrands itself Unicron