With regards to the Pirates minigame, it and Haunted Mansion have yet to be released or have a predicted release date. The minigames are the hardest things to code (and pirates the hardest of them all), so it could be some time. There have been rumors that the next one to come out will be the music mixer games.
For Santa, nobody knows - staff had hinted that there may be more events, so nobody knows. However, he is also supposedly roaming the kingdom, so there's a chance you may see him randomly walking around
Welcome by the way!
-Whispered