Last modified: 2013-12-24 00:37:00 UTC
Write UndeleteBatch extension that restores all revisions of deleted pages on a list that the user provides. Basically it does the opposite of what DeleteBatch does.
It would probably be better to just have a delete/undelete toggle on Extension:DeleteBatch rather than a whole new extension, but here it is: https://www.mediawiki.org/wiki/Extension:UndeleteBatch