Hello,
You may or may not have complete your assessment yet and now I suspect you've done some reading around this type of injury,
if not then things you may want to consider are;
soft tissue healing
bone healing
type of # (weber classification)
mechanism of injury
Patients expectations
Patients goals
Motivation etc
They may of visited an orthopaedic surgeon and have a protocol to adhere too so you are right your initial assessment may change somewhat depending on what they present with once cast is off and they are in front of you.
good luck