The second first tier aid will concern her activities, though. She might make a show, even if not as a boss. She seems to have a penchant for that anyway.
I think this is going a bit like MoP. Starts out as faction rivalry(although a bit more explicit), then segues into something different. That one also started as Horde and Alliance going to new lands for resources.
What i like most is that the stakes have been lowered. Legion was essentially fighting a force that threatened the entire universe right from the start. For now, we're just beating up each other.