Since there are comparisons between the permanent struggles of dementia that some with severe concussions experience and people with Alzheimer's Disease experience, this drug may be of value some day.

The concept of antibodies to help with all forms of brain injuries has been researched for a few years now.

The antibody aducanumab reduces Aβ plaques in Alzheimer’s disease : Nature : Nature Research

Alzheimer’s treatment appears to alleviate memory loss in small trial : Nature News & Comment