We could pull this information into a Constituents Query:
  1. Go to Analysis>Information Library and click Add an Ad-hoc Query.
  2. Choose the Constituents Source view.
  3. In the left column, expand Prospects, expand Prospect Plans, and click Opportunities
  4. In the middle column, drag Likelihood and Likelihood Percentage to Results fields to display.
  5. If you just want to see those records with a Likelihood value, drag Likelihood from the Middle column to Include Records Where. Change 'Equal To' to say 'Not Blank.'