André–Pink conjecture with unpolarized isogeny classes

Let $\mathcal{A}_g$ be the moduli space of principally polarized abelian varieties of dimension $g$ over $\mathbb{C}$, and let $Z\subset\mathcal{A}_g$ be an irreducible algebraic subvariety. André–Pink conjecture with unpolarized isogeny classes. The André–Pink conjecture for $\mathcal{A}_g$ should remain true when “a polarized isogeny class $\Sigma$” is replaced by “an isogeny class $\Sigma$.” The text presents this as a priori slightly stronger and more natural from the perspective of abelian varieties, but supplies no resolution status.