Joel Eisner mentions, in his Batman book, that the role of Minerva in the series' final episode was originally intended for Mae West. It's not clear from the text whether he saw studio paperwork to that effect, or if it was something William Dozier told him in an interview.
Because there was a Mae West cameo in the script for "Ring Around The Riddler," which was apparently never filmed, it's been conjectured that the Mae West/Minerva connection was erroneous - but check out these December 1967 items that ran in the TV columns of various newspapers:
Dec 1st '67:
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Dec 17th '67:
Also, for the record, there was this Dec 9th '67 item about Zsa Zsa's forthcoming appearance on the show:
- 671209-batman-gabor-2.jpg (19.06 KiB) Viewed 1600 times
Since Ms. West would presumably have received no billing for a standard cameo, those references to the "Mae East" billing gag seem like pretty good evidence that the producers had made at least tentative plans for a full-fledged "guest star" part for Mae.
