Originally Posted by
Qualia
Not entirely true.
The "Void Lords are stronger than Titans and they are just jealous of the Titans' ability to go around the physical universe" is purely fan speculation, or using the more negative term - headcanon. As people just stated a few post above, Chronicle only stated that the Void Lords are jealous of the Titans' power. Period. The "ability to go around" part is just headcanon - for all we know, in WoW so far, power means... power, strength, offensive ability, etc. There is no indication whatsoever that the Void Lords are stronger than the Titans, and no, Sargeras is NOT afraid of the Void Lords. When he first detected the Void Lords, all his reaction was being concerned and puzzled about them, but ultimately he went back to hunting demons. If the Void Lords are more powerful than the Titans, Sargeras would have been a lot more cautious about them. In fact, the Void Lords manifested in our universe and tried to control the Titans, but realized they couldn't do that, that's why they switched targets to infant world-soul. Additionally, Sargeras was never afraid of Void Lords' power. He was afraid of the Void-corrupted Titans (or Dark / Warped Titan, using Chronicle term) - who would act as agent for the Void Lords and consume everything, bring all motes of existence under the Void Lords' will - but not the Void Lords themselves. Power-wise, the Void Lords *seem* (hard to say, even with all stated in Chronicle, as we haven't gotten much lore about them) to be lower than the Titans - their gig was mainly their ability to corrupt everything but adult Titans instead of pure power.
Lastly, while I agree that the Keepers are weaker than the OGs in one on one, Yogg taking control of Keepers weren't thanks to how powerful (or less so) he was. Yogg *failed* in controlling Loken even when Loken was mentally weakened / disturbed due to the event with Pantheons' spirits. That's why he had to switch to indirectly manipulating the event by twisting Loken's love with Sif. By his own, Yogg would never been able to take control of Loken, much less all five. After Loken's betrayal, all other Keepers were controlled only after Loken defeated them.