We're in 2382 now, and the Typhon Pact will still be a young power in 2387, so how would it fare with the loss of one of its major members?
Though I have serious doubts that a single supernova could "endanger the entire galaxy" as the Hobus supernova has been postulated to do, unless it was such a super-huge star that the shockwave made sure that every star in its path also went supernova, causing an A/BQ wide ripple effect.
With all that said and done, I am looking forward to what happens in the Prime universe when we reach 2387 and see this come to pass. I would also like to see how the events of Countdown are set up in the primelitverse.