When is it?
Next content patch is in the final stages of tweaking and testing. No exact ETA other than "quite soon", or early November at latest (well, almost certainly).
What's in it?
The next galaxy, next version of reactor, sectors up to 142 or so, bunches of upgrades, eoc balance tweaks (read: slight nerfs sorry T.T), some QoL changes and bug fixes.
Important info for those done with Galaxy 6
The most major thing to be aware of is that Corruption Points will be capped at 700 Corruption. Meaning if you have over 700 corruption and the points from them, it will be reset to 700 and the appropriate number of points. This was just way over scaled with all the corruption cap upgrades (those have been reduced).
Additionally, a reinforce will be required to unlock the next galaxy and trigger another feature, this is mostly relevant to someone who is finishing galaxy 6 artifacts soon. Unless you are a fairly active player and confident you will speedily get back up to the sectors you were at, you might want to wait to reinforce with the artifact grid done until after the patch. This will just save you a potentially "lame" feeling reinforce.
Beyond that, the last update ended with people getting quite a bit further then originally intended in terms of total power. So this patch will trim the top off of that a little bit. Shouldn't be much (if any) direct combat power lost, but expect a slight hit to most systems if your sitting pretty at sector 130+. However, these losses will be regained almost instantly when you hit reinforce after loading up the patch, part of the reason for reducing them here was to be able to put a bit more power into some of the new upgrades with this patch.
A few light previews (subject to change):
Fighter targeting priority settings
New late game utility core for everyone's favorite system
A nice Reinforce QoL upgrade from the new galaxy
See the previous teaser post if you want a few more tidbits of info.