Other and Rumored Projects
A Spanish magazine article a few months before Soledad's death mentioned that she appeared in two telenovelas for Pan American Television. This may have happened in late 1969 or early 1970. However, the titles of the soap operas and any details about them are not known.
Many filmographies say that Soledad appeared uncredited in the 1968 western White Comanche (Comanche blanco), starring William Shatner. It was filmed in Spain and did feature many Spanish actors. IMDB says Diana Lorys also appeared uncredited. I have watched this film and cannot spot Soledad in it. The only person who could remotely resemble Soledad is a woman walking in a procession: see here and here. It was filmed during the period when Soledad was retired from cinema and even if she had been performing still, she had risen way beyond being an uncredited background extra! It was released in December 1968; it was only in December that Soledad announced her return to cinema, having been offered a role in 100 Rifles. Have you seen this movie? Do you think Soledad is in it? Let me know! Similarly, some filmographies say Soledad also appeared uncredited in the 1970 western Cannon for Cordoba, which is also unlikely as IMDB doesn't even list her in the cast.
Some filmographies indicate that Soledad had an uncredited role in Jess Franco's 1962 musical comedy Vampiresas 1930, although IMDB does not list her in the cast. However, according to Franco's associate Kevin Collins, she was not in that film; he says the confusion may have arisen because that film is often aligned with La reina del Tabarín in filmographies, so people assume since Soledad was in one, she was in both. However, that is not the case.
It has been said that after the completion of Juliette, Soledad was supposed to be in Jess Franco's movie X312 - Flight to Hell, but died before the movie was filmed. This was confirmed by her would-be costar in the film, Thomas Hunter; Gila von Weitershausen took over the part. It was filmed in Brazil, and Soledad was about to travel to Latin America for theatrical engagements when she died. She may very well have been headed on to South America to make this film after that. However, Jess Franco himself said: "We - Brauner and me - decided to make this film after Soledad's death." Unfortunately, Jess Franco's recollections are not always accurate! In what was apparently her last interview, Soledad told a Spanish reporter about her upcoming films for Brauner: "One of them on the life of one of the women who were involved with Charles Manson, that murdered [Sharon Tate] driven by the will of Manson... And another on Voodoo." The details of these planned projects may never be known.