This thread started 3 years ago, I feel adidas has been way too slow. Then adidas does such a lackluster release, there is zero marketing or any talk outside dedicated groups.
Why do you need to get them fast, they are GRs and available all year round. I always see them on sale
20% off at END
https://www.endclothing.com/gb/new-balance-m991gl-made-in-england-m991gl.html
And SNS
https://www.sneakersnstuff.com/en/product/38649/new-balance-m991