  We briefly review the recent progresses in the new unitarization approach
being developed by us. Especially we discuss the large $N_c$ $\pi\pi$
scatterings by making use of the partial wave $S$ matrix parametrization form.
We find that the $\sigma$ pole may move to the negative real axis on the second
sheet of the complex $s$ plane, therefore it raises the interesting question
that this `$\sigma$' pole may be related to the $\sigma$ in the linear $\sigma$
model.
