We use SSO and display identical profile details on our wordpress site and in discourse. Most profile details are updated via wordpress gravity forms, but the avatar is handled via discourse user settings. Since avatar is one of the first things people want to change, we’d like to allow our users to click their avatar on their wordpress profile or a link displayed on their wordpress user settings and be taken directly to their discourse user settings with the avatar change popup window displayed.
This could probably be handled similarly to the Link to private message a user from outside via URL plugin. E.g. append ?avatar=true to a Discourse user’s preferences URL or my/preferences?avatar=true and trigger the avatar change dialog.
We’d be willing to contribute 
to help make this happen.
Preferably core PR but plugin also ok. PM me if interested.