I read this thread with interest, and I hope the best for the Canadian navy in its procurement of this new class destroyer, which many of us believe is long over due, and hence we are happy to read about such finally.
As for the defencehub recent post post in this thread with the infographic and updated details, in regards to the Electronic Warfare kit, there is no mention of the communications intercept (SIGINT) fit , where other unclassified source notes this could be the "Project Strongbow" AN-SRD-506. While difficult to be certain, the most current Canadian Department of defence info graphic sketch for the River Class Destroyer does suggest the antenna of such equipment, and hence this could be the planned SIGINT fit.
Further the defencehub article, while listing the SEWIP Block-2 (SLQ-32 variant) as the ESM, and the Nulka system as a missile decoy system, it also lists the Raven ECM as being fitted on the River Class with an FMS procurement path and Aegis Integration path. I have not read any unclassified sources claiming Raven being interfaced to Aegis in the past. If one looks at the info graphic sketch, the antenna for the Raven, which could be observed in earlier speculative sketches of the Canadian Surface Combatant (CSC), are not observable in the most recent Canadian Department of Defence sketches. One could speculate that means (1) such Raven ECM antenna simply was not included in the sketch, or (2) the Raven ECM antenna has changed for this (and possibly other?) classes of warships, or (3) Raven ECM is not included as part of the River Class destroyer procurement, or (4) I have a misunderstanding as to the Raven antenna appearance.
My hope is that the Canadian Navy, in addition to the Nulka active decoy system, does procure an additional effective active ECM equipment for this class of warship (such as Raven or an active SLQ-32 variant (ie w/Sidekick or other?)).