How to get specific planning information from Portfolio

I have a specific amount of work that my client wishes to have completed by fixed points in time.

I have created epics in a plan and assigned them to versions that have fixed start and end dates. The workload estimate is currently in excess of the resource in the portfolio plan.

What I want to achieve is:
1. Find out how much the planned capacity is in total (rather than just per individual release) for each week / month / quarter over a specific period.
2. See a capacity view that shows how much more than the existing resource is required. e.g. Planned capacity 1000 hours, 121% capacity utilization, perhaps with the excess showing in red.

Is this possible?