Either that or we join them on raids on Naggarothian soil, but if that's the case, it's not going to be anything major. Skirmishes are constantly happening around the Arnheim area, and the trip there and back is likely to be somewhat lengthy, so I doubt we'll be doing much of that if any.
I highly doubt something as ridiculous as Alith Anar popping up and launching a large scale invasion on a major Druchii city where we get involved in it is going to happen, although if this was a Gotrek and Felix novel that's probably what would happen.