Has the first evidence of extraterrestrial life been discovered?

It has been announce by NASA that a news conference will be held on the 2nd of December. The details are embargoed until then but the press release by NASA states that the topic will be "an astrobiology finding that will impact the search for evidence of extraterrestrial life".


Could it be that some evidence of extraterrestrial life has been discovered? If that is the case, what kind of organism can it be? 


I always firmly believed that life must be abundant in the universe, but the sheer vastness of it would make it difficult for us to discover since we are in our technological infancy.


Will our view of the universe change in 2 days? Will we live in an age when proof exists that Earth in not the only planet which supports life? Will science fiction become science fact?


I eagerly await the news conference to find out!