I’m not going to hold my breath.
If anything, the trend seems to be towards disunity over the last few decades. South Sudan splitting off from the rest of Sudan, Eritrea leaving Ethiopia (and now, Tigre maybe in the process of leaving Ethiopia), Nigeria drifting towards maybe a three-way split (north and southeast breaking away?), Libya seemingly splitting east/west, the list of divisions goes on and on.
Sure, some success stories here and there (Botswana in particular, arguably Senegal and Ghana too), but continent-wide unity could take a long time.