Austria's far right* leader Jorg Haider has been killed in a car crash, just weeks after his success in Austrian elections. Whilst a conspiracy theory is unlikely the timing of his death makes them inevitable as others have already noted.
As I understand it, poisonous personal relations between Jorg Haider and the leader of Austria's other party of a similar outlook made it very difficult for them both to enter a coalition together so that is one obvious beneficiary right there.
* I don't like the term "far right" as I consider fascism to be a cult of the far left, but am using the term because it is widely understood. The Freedom Party used to belong to the same international grouping as Britain's Liberal Democrats amusingly enough.