It's interesting, because the 2 yet burning station and the outpost in those systems are military, and most attacked stations not mainly extraction. From another angle, all the attacked systems including the last 2, has extraction economy, and interesting to see, if you filter to it, only those were attacked. However still multiple systems are around the Nebula with Aegis stations, but only one left with extraction economy: Pleiades sector PD-S B4-0, Ieyasu Dock. Most likely the next target on this logic.
I think 42 N Persei will not be the next target, because no Aegis presence in that system. However if it will be, then not Aegis the only target.
I also noticed the dominant of the ext. economy when the new bases were built, before the first attacks, but I wasn't saw any importance, I thought it is a big extraction project around the Nebula. Edit: The periphery of the bubble also more ex/ref/industry. Towards the edge are less and less agri/high tech/service etc economys.
Edit: newer mind about 41 N Persei, just looked up the galnet article about Aegis, that station also built in that project, so can be a target.