1. A method for surgical planning, comprising: displaying a set of related two-dimensional (2D) anatomical images; identifying a plurality of anatomical landmarks on the set of 2D or 3D anatomical images; scaling a three-dimensional (3D) representation of a parent prosthesis to match a scale of the 2D anatomical images based at least in part on a relationship between the anatomical landmarks; and displaying a 2D representation of the scaled 3D parent prosthesis on at least one of the 2D anatomical images.