Looks like a March Announcment and April release.
http://www.gsmarena.com/samsung_to_launch_galaxy_s5_with_iris_scanner_by_april-news-7528.php
A VP at Samsung has confirmed the company will be launching its latest smartphones flagship, the Galaxy S5, by April.
Just like its Galaxy S4 predecessor, Samsung is once again targeting March for the official announcement and April for the release date for the Galaxy S5. This means the manufacturer won't be bringing any flagship phones on the upcoming MWC in Barcelona next month.
http://www.gsmarena.com/samsung_to_launch_galaxy_s5_with_iris_scanner_by_april-news-7528.php