Kevin Hill builds a script to reload all databases at once:
We are doing a major upgrade this weekend, so like any good DBA, I have planned for a full backup the night before and needed the ability to quickly restore if it goes sideways and needs to roll back.
The catch is that there are close to 300 identical databases involved.
This is easy enough to do if you know where info is stored in MSDB related to the last backup.
Click through for the script.