The stabilized-unknot formula for the annular Khovanov invariant

Let $\sigma_n^{\epsilon_n}\sigma_{n-1}^{\epsilon_{n-1}}\cdots\sigma_1^{\epsilon_1}$ be a stabilized unknot, where each $\epsilon_i=\pm1$, and let $W_0$ denote the corresponding invariant in the annular Khovanov decomposition. Stabilized-unknot conjecture. Its graded dimension is

$$\dim W_0=z^{-\sum \epsilon_i}(qz+q^{-1}z^{-1}).$$

This is a conjectural formula for the annular grading of stabilized unknots; the supplied text gives no resolution or further evidence about its status.