Diamond Select Avatar : The Last Airbender Action Figures - Aang, Katara and Zuko
We got a small look at the Diamond Select figures for Avatar : The Last Airbender at SDCC 2019 where they were shown on a presentation screen and listed as a Walgreen Exclusive.

The figures have now been solicited and may not be as exclusive as first thought. This may end up being a similar deal as we've had with some of the Kingdom Hearts figures with special packaged sets in Walgreens and a general release elsewhere.

The first wave is made up of Aang, Katara and Zuko. Aang comes with his Spear, Katara with a water effect and Zuko with a fire effect. There are other "interchangeable" parts quoted on the blurb, but no details
They are scheduled for a December 2019 release.

This assortment of 7-inch scale action figures shines a spotlight on Season 3 of the hit animated series Avatar: The Last Airbender. Aang, Katara and Zuko each come with accessories and interchangeable parts, and each comes packaged on a blister card. Designed by Eamon O'Donoghue, sculpted by Richard Force.
Product Features
7 inch (17.78cm) scale
Made of plastic
Shines a spotlight on Season 3 of the hit animated series
Highly articulated
Packaged on a blister card
Sculpted by Richard Force
Box Contents
Aang figure & Spear
Katara figure & Water effect
Zuko figure & Fire effect