I’ve noticed a trend that ties US amiibo release dates to DLC releases/in-depth looks.
Joker got his in-depth look on April 16th, a Tuesday, and a release the next day on April 17th. The Friday before April 16th, April 12th, the Young Link, Ken, and Daisy amiibo released.
The Hero got his in-depth look/release on July 30th, a Tuesday. The Friday before July 30th, July 26th, the Pichu, Isabelle, and Pokémon Trainer amiibo released.
Looking ahead to Banjo-Kazooie, they are slated for a Fall 2019 release. The next wave of amiibo, Squirtle, Ivysaur, and Snake, is slated for September 20th, which is a Friday. Therefore, I predict that we will see an in-depth look at Banjo-Kazooie on September 24th, and see Banjo-Kazooie release on either September 24th or 25th.
Looking even further out, the Incineroar, Chrom, and Simon amiibo are slated for November. I predict that we will see an in-depth look on DLC Fighter 4 the Tuesday after this figures release, and DLC Fighter 4 will launch on the Tuesday or Wednesday following the amiibo launch.
Finally, that brings us to the Richter and Dark Samus amiibo, along with DLC Fighter 5. This one actually goes the other way. DLC Fighter 5 is slated to come out by February 2020, and that would make sense, considering it is about the standard 3 month gap that I have predicted. Therefore, we can assume that the Richter and Dark Samus amiibo will launch the Friday before the launch of DLC Fighter 5.