I think I’ve figured out who will be the target of the Scrumptious Scoundrels ambush next episode
It is specifically mentioned that Lazuli dies in 1190 (the year episodes 2&3 take place) after her mother, Pamelia Rocks, but it is never stated how or when Pamelia dies. We know she is alive at least in 1188, as we saw her in episode 1.
Pamelia is fructeran by blood, despite having married into Candian royalty. The target of the ambush is said to be, moving under the banner and guise of Fructera, and since Pamelia is Candian by marriage, moving under Fructeran banners would technically be a guise.
According to an FAQ with Brennan, Pamelia was in an alliance with Tomaté, giving her the ability to potentially keep Candian forces from joining the war, or having them join on the side of Tomaté. This could be what the FDA meant when they referred to the target as a “dangerous untenable political operative”
The Glucian roads proximity to Castle Candy is specifically pointed out.
This is more of a reach based on a post I saw a few days ago (linked here) but it is shown in ACOC that the princesses had an alliance against and did not agree with their mothers politics. If Sapphria is a part of FDA, she may have been the one to supply information of her mothers movements to the organization, or even have organized this ambush in order to get Pamelia out of the way to begin with
TL;DR - I think Pamelia is the target of episode 3s ambush