No, se pudo hacer, pero era inviable, uno de los productores dice que fue por cuestiones de agenda (por aquel entonces, le habian fichado para The Witcher y creo que los rodajes coincidian)
Ademas, Sandberg ya lo comento en su dia
Sandberg confirmed that Superman's cameo was alway part of Shazam!'s screenplay during our interview with him, adding that the Man of Steel "was definitely something we wanted to have in there". In a separate interview with Inverse, the director added that Cavill was originally supposed to reprise his DCEU role as the character, but was "unavailable" when the crew was filming the scene in question at a real school in Toronto (which was on-holiday at the time).