Sure will be nothing of much interest to normal people. Some fancy planet far, far away that have trace amount of something something particle that prove 0.5% of something something theory - something along that line.

Told you, nothing of much interest. Only the most geekiest scientist would strike mild smile when hearing this press conference.

Come on la, if it is really something about ET, it won't be announce by NASA. The White House, military and CIA would take over from them, and the person who will announce is the President (very important moment in human history, you want some NASA director to take the limelight from the president?).