Complex sentence: All seems to be going well for Mega, but his co-Guest of Honor, Dungannon, is making it a point to offend everyone at the con, and it is hardly surprising when he is killed, a bullet through his heart.
Split into simpler sentences: All seems to be going somewhat well for Mega, but his co-Guest of Honor, Dungannon, is making it a point to offend everyone at the con. It is hardly surprising when he is killed, a bullet through his heart.