Whittaker-Fourier coefficients of cusp forms on Sp_n: reduction to a Local Statement

In a previous paper we formulated an analogue of the Ichino-Ikeda conjectures for Whittaker-Fourier coefficients of cusp forms on quasi-split groups, as well as the metaplectic group of arbitrary rank. In this paper we reduce the conjecture for the metaplectic group to a local conjectural identity. We motivate this conjecture by giving a heuristic argument for the case (Formula presented.). In a subsequent paper we will prove the local identity in the p-adic case.