There is now a site up for getting a ticket to the 2PM Platinum Showcase LIVE "2PM 1st Contact in JAPAN" that's going to be held at Ryogoku Kokugikan.There is already a ticket for this event that comes with the 'Hottest ~ 2PM 1st MUSIC VIDEO COLLECTION & The History' DVD. This site is for those who haven't bought the DVD, but still want a ticket to the event.
Here is the site: http://www.2pmjapan.com/kokugikan/
Also, an official goods online shop will be opening on 11/24 at 12:00 (Japan time of course, so you'll need to convert if you're in a different timezone). There's no info yet as to what kind of 2PM goods they'll be selling, but be sure to check the site out once it's open~Here is the site: https://store.colors-ent.jp/2pm/
Source: 2pmjapan.com/info