We often don’t want (users to) to navigate or open new panel, to prevent unnecessary distractions, whilst allowing additional information to be available from related entities. The most unintrusive solution has been known for long: tooltips, which popup by hovering over a tiny label such as a triangle in the corner of a field or inline reference.
Here is a mockup, which shows the Support Page, which should not be necessary to display when there is a tooltip that shows the first x characters of the content.
Another way to implement this, is to have an ajax call inject the content under the inline entity link by expanding it, so that the rest of the content under it is pushed down.
