Tetris Ultimate is available for pre-order, release date 23/01 according to GAME UK:
http://www.game.co.uk/en/tetris-ultimate-306807/?merchname=psvita-_-banner-_-TetrisUltimate
After seeing IGN's preview of the PS4 version, I hope they fixed the game for Vita version or it'll be a slideshow too xP
Also happy new year to all of you Vitans ;)