Hello,
I can help you out with this. It is possible to add more information to the ToolTip(hover preview), but it does involve some customization to a template.
If you follow our Themer’s Guide you can move the tooltip.php and single-event.php file into your theme to edit.
https://theeventscalendar.com/support/documentation/events-calendar-themers-guide/
There are instructions in the single-event.php on how to make the edits.
I found this ticket that has the coding you may need:
Display event organizer in tooltip in monthly calendar grid view
Instead of using tribe_get_organizer you can use tribe_get_venue
Here is another topic that might provide some insight as well.
Add venue to week view tooltip
If you get the moved over to your theme and get stuck making the changes, please let me know and I can help on the next step.
Thanks
-I moved this ticket to the Pro Forum as it fits better there.