Honestly, though the ethics are certainly dicey, I do wonder whether recreating a bridge intelligence between man and animal would raise appropriate societal questions that we've chosen not the think about all of modern history (lacking any sort of Neanderthal cohabitant).
It might help us all be in more relation with the world. Our lack of relation feels to me to be part of what's driving us into this extinction event. A "monstrosity" that convinces us to rethink the moral rights of other living creatures would perhaps be welcome...?
Maybe it ends up being the unasked-for bastard creature that saves all the others (incl us) from us, just by making us slow down and go "hold on hold on hold on. what THE FUCK?"