Complex sentence: With Cybertron restored, Optimus Prime was remembered as a war hero and the world was virtually devoid of Decepticons, though trouble stirred up every now and again in one form or another.
Split into simpler sentences: With Cybertron restored, Optimus Prime was remembered as a war hero and the world was virtually devoid of Decepticons. Despite this, trouble stirred up every now and again in one form or another.