Classification conjecture for generalized polarized Fano manifolds with l(R_1)=n

Let $M$ be a Fano manifold of Picard number one and let $\mathcal{E}$ be an ample vector bundle of rank $r$ on $M$. Let $L$, the extremal ray $R_1$, and a minimal rational curve $C_1$ be as in the common setup, and set $l=L.C_1$. If the length of $R_1$ is $l(R_1)=n$, then the classification conjecture. $(M,\mathcal{E})$ is one of the following:

$$(\mathbb{Q}^n,\mathcal{O}(l)^{\oplus r});$$ $$(\mathbb{P}^n,\mathcal{O}(l)^{\oplus (r-1)}\oplus \mathcal{O}(l+1));$$ $$(\mathbb{P}^n,T_{\mathbb{P}^n}(l-1)\oplus \mathcal{O}(l)^{\oplus (r-n)})\qquad (r\geq n).$$

This conjecture predicts a complete classification of the generalized polarized manifolds satisfying the extremal-length condition $l(R_1)=n$. The preceding argument establishes the listed possibilities in the cases treated there, while the full classification is posed as an open conjecture.