It might be of interest to some of the list members that the book, Origen of
Alexandria and St. Maximus the Confessor: An Analysis and Critical
Evaluation of Their Eschatalogical Doctrines, by the moderator of this list
(Edward Moore) was recently published.
Edward spends a good portion of this work exploring Neoplatonic developments
between the times of these thinkers, and how their own brands of Platonism
resulted in profound differences in their eschatological thinking.