It'll be useful to have some Triggers for tasks in Planner, not just actions that are executed based on triggers from elsewhere.
Triggers for Planner are now available, read more here: https://flow.microsoft.com/en-us/blog/planner-triggers-connector-improvements/
Yes! This is exactly what I am after also!
@Stephen - Are you able to tell us if there are any other planner-related features on the roadmap? I know that I've seen several requests for "Create Bucket" action, "Task completed" trigger, and my personal suggestions - "Create Task" allows assignment to multiple people at once, and "Create Task" allows for the description to be input at the same time.