I couldn't find this as an actual solution, but I figured it might help others to have this posted. Thanks goes to user UAL Desktop Services for the groundwork and clues:
Here are the files you need to modify:
/Users/<logged in User>/Library/Application Support/Adobe/Lightroom
/Users/<logged in User>/Library/Preferences/com.adobe.lightroom5.plist
/Users/<logged in User>/Library/Preferences/com.adobe.lightroom5.LSSharedFileList.plist
Copy them from a user that has already confirmed and accepted the region/license window, and move them to the "Global" Application Support and Preferences folders:
/Library/Application Support/Adobe/Lightroom
/Library/Preferences/com.adobe.lightroom5.plist
/Library/Preferences/com.adobe.lightroom5.LSSharedFileList.plist
Right click the .plist files and under "Sharing & Permissions" set Read-Write permission for everyone.
Do the same for the Lightroom folder, but also click the settings "cogwheel" icon below the permissions area and select "Apply to Enclosed Items".
The global settings will override the local user prefs and should suppress that screen. Keep in mind, the license key can still be viewed from Help > Registration in both Mac and Windows still (if anyone has a solution for that I'd love to see it).
Optionally, you can suppress the catalog location window by specifiying it in the /Users/Shared folder, setting "everyone" Read-Write permissions on /Users/Shared/lrcat/, and "Apply to Enclosed Items" again.
There's no reason this couldn't also be scripted or captured via JAMF Composer for deployment, if needed.