This was indeed good news for Roy because it meant that some of his memories could still come in handy.
Of course, variables like him often led to historical changes. He was already mentally prepared, and he could not say how useful his memories would be.
Without a doubt, both Archimonde and Kil'jaeden were still alive, indicating that the Burning Legion was currently at its most glorious and prosperous period. The Burning Crusade was still invincible, and Sargeras was in high spirits. As for whether the Legion had encountered Azeroth, this incomparably tough bone, Roy didn't know. Perhaps he would know when he went to Argus.
Yes, Roy was preparing to join the Burning Legion… There was nothing he could do about it. With his identity as a demon, where else could he find a place that could tolerate his existence?
