[Shanghai] Mini Mulan Tsum Tsum Set
A new Mulan Tsum Tsum set has been spotted in Shanghai Disney Store. The picture shows a mini Mulan, Shang, and Mushu Tsum Tsum. Currently, we do not know if this set will release outside of China.
Preview: Incredibles 2 Tsum Tsum Collection
Here is a first look at the upcoming Incredibles 2 Tsum Tsum collection. The set consists of nine mini Tsum Tsums including Mr. Incredible, Elastigirl, Violet, Dash, Jack-Jack, Frozone, Edna, and more.
The collection is confirmed coming to Europe, Hong Kong, and U.S. (rumored June 5th). There is no official release date yet.
[Hong Kong] Fruity Summer 2018 Duffy Tsum Tsum Collection
A new Duffy Tsum Tsum collection is coming soon to Hong Kong Disneyland to celebrate summertime.
The set features Duffy, ShellieMay, Gelatoni, and StellaLou in fruity outfits.
[Europe] Tsum Tsum Tsuesdays – April 17, 2018
The Summer Sea Life Tsum Tsum collection is now available in Europe. This fun set features characters like dolphin Mickey, mermaid Minnie, mermaid Daisy, crab Donald, and narwhal Goofy.
Summer Sea Life Tsum Tsum Set
Scrooge McDuck Tsum Tsum
The DuckTales Tsum Tsum set released online a couple days ago in Europe, however Scrooge McDuck was nowhere to be found. The listing for Scrooge McDuck is now online!
[Europe] Surprise Release DuckTales Tsum Tsum Set
A new DuckTales Tsum Tsum set just released online in Europe! This set was unannounced and a pleasant surprise. 
The collection includes Huey, Louie, Dewey, Webby, and Scrooge McDuck. However, there doesn’t seem to be a listing for Scrooge McDuck.
[Japan] New Tsum Tsum Costumes
Twenty-one new Tsum Tsum costumes just released in Japan, including Mickey, Stitch, Cheshire Cat, Mocha, Max, and more. These costumes can be put over your mini Tsum Tsums to give them a new look. 
[Japan] Cinderella & The Little Mermaid Wedding Tsum Tsum Set
Two new cute Tsum Tsum sets are coming to Japan, a Cinderella and The Little Mermaid Wedding set. The collection is based on the royal weddings of Cinderella and Prince Charming & Ariel and Prince Eric. Both set will release online on April 13th and in stores on April 20th. Each set retails for 1296 JPY (~$12 USD).
Cinderella and Prince Charming Tsum Tsum Wedding Set
Ariel and Prince Eric Tsum Tsum Wedding Set
[US][Europe] Tsum Tsum Tsuesdays – March 20, 2018
The Chip ‘n’ Dale 75th Anniversary Tsum Tsum box set is now available in the U.S. and Europe.
Chip ‘n’ Dale are dressed to impress with their tuxedos and top hats. The set was inspired by the animated short Two Chips and a Miss. The box set retails for $12.95 (£8.00).
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Europe:
The Tsum Tsum Summer series is releasing April 17th in Europe!
[Japan] Chip ‘n’ Dale 75th Anniversary, Rescue Rangers, and New UniBEARsity Tsum Tsum Sets
Three new sets are coming soon to Japan including the Chip ‘n’ Dale 75th Anniversary Tsum Tsum box set, Rescue Rangers Tsum Tsum box set, and a new UniBEARsity Tsum Tsum set.
Chip ‘n’ Dale 75th Anniversary Tsum Tsum Box Set
Release date: March 23
Rescue Rangers Tsum Tsum Box Set
Release date: March 23
New UniBEARsity Tsum Tsum Set
Release date: March 30 (online) / April 6 (stores)
Preview: Sea Life Tsum Tsum Collection
This new Sea Life Tsum Tsum was accidentally published on the UK Disney Store site and was quickly removed. Fortunately, a reader saved the image for us.
The set features Donald, Goofy, Minnie, Mickey, and Daisy. It should be releasing in Europe soon.