Just noticed this on the bottom of Tamashii’s Japanese website. They had this last year too where they showcased the entire upcoming Tamashii portfolio including Dragon Ball. This year, the event will be held from November 19 through the 21st, right before Thanksgiving. There are some exclusive items from other series that have already ended. The explanation on the website isn’t exactly clear on what this event is about, but I assume there will be another online VR type experience where you can walk around different rooms to see different figures.
I will update as more information becomes available, but you can checkout the website for the time being!