Let’s say that Mary contracts a disease and dies in 1552 or so, taking her out of the succession. Assuming Edward still dies on time, Elizabeth is next in line by statutory law, but I would imagine that as IOTL, Elizabeth would be disinherited by Edward, and Jane Grey would be queen. Would Elizabeth (only about 20 at this time) be able to martial the support her elder sister was able to IOTL and force the council to declare her king, or would Jane remain in place? I’m also not sure to what extent she was Catholic vs Protestant at this point, as without any knowledge it seems plainly possible that she would be Catholic without Mary’s reign more or less discrediting Catholicism. Alternatively, is it possible that Edward would have used Mary’s death to become closer to his sister Elizabeth and assured of her commitment to Protestantism?