Dreamwave comics ended abruptly so the answers will never be known.

This is how I take it: in the Dreamwave Universe, Unicron created the Sweeps to find Cybertron which at the time was in status lock, along with all the Transformers on the planet.

One of the Sweeps, Scourge, found Cybertron. His arrival woke up Shockwave which led to everyone eventually being woken up and Cybertron to be in the situation it was in during that story. Scourge probably wanted to see what the planet's inhabitants were like so he could report their threat level to Unicron.

Scourge was only ever working for Unicron and wasn't really a Cybertronian at all. Since Shockwave had experimented on Scourge (and likely done some brainwashing, erasing Scourge's memory of his origin as a herald of Unicron) Shockwave wanted Scourge silenced (hence the 'fugitive' thing) to keep his expierments and secret plans from being revealed.