Indeed - a true Klingon isn't afraid to confess that the highest honor is in winning... ("Way of the Warrior")
Yes, it's mentioned in the comics.
But the comics make so little sense overall. It can't be some obscure "Hobus" that is blowing up, because Spock deploys his red matter into the supernova in the Romulan home system
. He sees Romulus die with his own eyes - and so does Nero, who immediately confronts Spock and ends up falling into Spock's black hole, which thus lies right next to Romulus.
There can't be any travel time and distance between the spot where the red matter is deployed and the spot where Romulus used to stand, because
a) of the seeing with one's own eyes thing
b) Spock has a fast ship and Nero has a slow one - no chance of a long chase there
On the other hand, deploying the red matter anywhere else than at the heart of the supernova would make little sense. What possible good would asymmetric deployment at the fringe of a deadly wavefront achieve? Yet Spock seems sure that his deployment will solve the problem once and for all (even if a bit late).
Ergo, the supernova was right next to Romulus...
Which is a very good thing, because supernovas generally aren't immediately harmful to planets in another star system altogether!
Personally I think Nero destroyed the Hobus star in 2258 as soon as he got the Jellyfish.
Agreed on that, if one believes in "Hobus" in the first place. Hey, since time travel in Trek usually involves going to the very same spot in space, only in a different time, odds are that the star we saw when George Kirk died would have been the very same that Spock belatedly extinguished in the future...
If one doesn't believe in Hobus, the logic still stands. In which case the star we saw could have been the Romulan homestar! In TOS, our heroes knew where the Romulan home was but not who the Romulans were. In STXI, they seem to know who the Romulans are, but not necessarily where they live.