The dreadlords are losing their appeal fast. Even during the intro quest to Zereth Mortis in Oribos we have one pop up. Even worse is that the dreadlord pops up right next to lady Vashj. Who earlier in the shadowlands story belittles you that you need help to find the dreadlords in disguise. Because she has been hunting them for so long she is a super mega uber expert at sniffing them out.So they hype her at being super good and then the next chapter there is one right next to her in Oribos and she doesn't notice. Either Vashj is a dreadlord aswel or the writing is so inconsistant that its killing off the appeal of the dreadlords for me.
The Dread Portal could either lead to a final encounter with Mal'Ganis or be a MacGuffin of galactic proportions with the zone just being a glorified 2.0 version of Argus.