Huh, I just had a curious thought.
What about gaming the Maghiz? Your characters are Darrians, far enough away from the event to get a running start. The official timeline gives you around 40 years before Darrian spaceflight collapses, but if you're ok with messing with the timeline, you could throw in Zhodani (creepy short (from the Darrian perspective) telepaths from high-G worlds that may or may not have been involved in the troubles) and Aslan (whose "timely" arrival in the area, possibly encouraged by the Zho, allows them to discover some ripe worlds that need order restored to them). Vargr were star travellers long before this time, so it's not crazy to have some Vargr around. In fact, it's likely the Darrians were well aware of Vargr, and likely had dealings with them.
Characters would be scientists or soldiers out on the frontiers of the confederation when the Maghiz goes off. Adventures would include trying to find a way to get "behind" the shockwave to mount rescue operations, figuring out exactly what went wrong, organizing to defend against the Aslan (and possibly turning them against the Zho), etc. The Zho could be (as usual) the bad guys, who arranged for the star experiments to go wrong because they needed to prevent the Darrians from continuing their rapid advance of technology. If you want to get *really* conspiratorial, you could have the Ancients "pushing" the Zho, since the Ancients (who didn't really leave, as we all know) have a vested interest in preventing anyone from reaching their legendary tech levels.
What about gaming the Maghiz? Your characters are Darrians, far enough away from the event to get a running start. The official timeline gives you around 40 years before Darrian spaceflight collapses, but if you're ok with messing with the timeline, you could throw in Zhodani (creepy short (from the Darrian perspective) telepaths from high-G worlds that may or may not have been involved in the troubles) and Aslan (whose "timely" arrival in the area, possibly encouraged by the Zho, allows them to discover some ripe worlds that need order restored to them). Vargr were star travellers long before this time, so it's not crazy to have some Vargr around. In fact, it's likely the Darrians were well aware of Vargr, and likely had dealings with them.
Characters would be scientists or soldiers out on the frontiers of the confederation when the Maghiz goes off. Adventures would include trying to find a way to get "behind" the shockwave to mount rescue operations, figuring out exactly what went wrong, organizing to defend against the Aslan (and possibly turning them against the Zho), etc. The Zho could be (as usual) the bad guys, who arranged for the star experiments to go wrong because they needed to prevent the Darrians from continuing their rapid advance of technology. If you want to get *really* conspiratorial, you could have the Ancients "pushing" the Zho, since the Ancients (who didn't really leave, as we all know) have a vested interest in preventing anyone from reaching their legendary tech levels.