  We propose a dual Wilson loop description for the MHV super form factors of
half-BPS operators in planar $\mathcal{N}=4$ super-Yang-Mills theory. In this
description, the local operators are represented by on-shell states, made out
of zero-momentum particles, that are absorbed by a null periodic super Wilson
loop. We present evidence for this duality at weak coupling, by performing an
explicit calculation of the Wilson loop matrix elements through one loop. At
tree level, the interactions localize at the cusps of the loop, revealing a
simple connection between the super form factors and the $m=2$ tree
amplituhedron. At loop level, we show that the Wilson loop calculation
reproduces the known results for the super form factors. Inspired by this
duality, we extend the OPE program developed for the form factors of the
Lagrangian to the super form factors of the higher-charge operators. We
introduce non-perturbative axioms and conjectures for the main building blocks
that govern the exchange of the lightest flux-tube excitations. These blocks
appear as simple refinements of the form factor transitions introduced in
earlier OPE studies. They are expressed at any value of the 't Hooft coupling
in terms of the tilted Beisert-Eden-Staudacher kernel. We carry out checks of
our conjectures up to two loops at weak coupling for three- and four-point form
factors of half-BPS operators of various lengths, finding perfect agreement
with perturbative data.
