Trigger to email user is criteria is met/not met?

I have been generating some triggers and most are simple and effective, unfortunately the most important action doesn't seem to be available. What we require is a action that generates an email to alert support staff / management if an incident has not been assigned within a specified timeframe.
This helps us to ensure that our customers are serviced in the correct manner and no incidents are missed.

What we would like to see is:

Incident status: is: "Pending - Action"
Created at: was: "xx hours/days ago"

Action = email group: "support" template: Unassigned

Is this something that would be possible or is there anything like this in the roadmap?

Many Thanks,
Ben