Conversation so far:
What did Fats Domino record after leaving Imperial?
After leaving Imperial Fats Domino moved to ABC-Paramount Records in 1963.
What else did Fats Domino do during this time with Mercury records?
Despite the lack of chart success, Domino continued to record steadily until about 1970, leaving ABC-Paramount in mid-1965 and recording for Mercury Records
What did Fats Domino record with Mercury?
With Mercury records Domino Fats delivered a live album and two singles. A studio album was planned but stalled.

Question: Why didn't he release the album?
Self-contained rewrite: Why didn't Fats Domino release the studio album with mercury?