1. Addon that
    a) Incorporate Add This into guest author for social media,
    b) Author box and/or integrate with existing author box (es) social media (Integrates with #1,4)
    c) Allow Multiple Authors
  2. Consider alternate post type so that co-authors plus and guest author name can be used at the same time.
  3. Integrate with Relevanssi search plugin/author search.