Can I use Blend SOP with other SOPs

Hi,
I would like to know if you’re able to use the blend SOP to morph between, for example, a sphere and a copy of that sphere with some deformations attached.

I understand the concept of morph targets and changing the points in a single model to create an animation. It would be good to do something like; take a font/letter, copy it, mess around with the shape of the copied letter, and then have a smooth transition between the two.

Is this possible?

Many thanks,
Ian