api.php?action=query&prop=revisions&revids=12345|67589|59|126 Will fetch revisions 12345, 67589, 59 and 126.
Yes, this works. However I only have a single revid and I want to retrieve both this revision and the previous one. To achieve this I need to call the API twice, one to get the title and then the second one to retrieve the updates.
Since it seems that revids are global, I found odd the need to include both revid and title.
Regards, -- Sérgio Nunes