Your question is Threat Model a New Application. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You're asked to support a new application before build and launch planning begins. The team wants a threat model early enough to influence architecture, controls, and delivery scope rather than becoming a late security review.
How do you approach threat modeling for a new application?