In the story of Ingress, The Secret Alliance is Something that is kept or meant to be kept unknown or unseen by others, even all teams will be divided and split into two.

But not known or seen or not meant to be known or seen by others, it's BECAUSE of all Resistance agents, who must be Keep the Secret Alliance with US and have a new plan to DESTROY and Capture THEM ALL, before the enemy does, just like a reference, tribute and elements of ALL the Legendary movies from the past and the future, including Disney's "Fantasia" and "Fantasia 2000".