Wildarmsheero recently linked me to an old interview with Sadamoto Yoshiyuki, character designer of Evangelion, where he describes Eva as being what would happen “if you add “Ideon” and “Devilman” together and divide by two.” A surprisingly accurate description when I actually think about that.
That brought my attention to a Post-Eva mecha show, RahXephon, which can in a similar fashion be described as the average of Evangelion and the old 70s Sunrise anime Reideen (not to be confused with the 2007 version or Chouja Reideen from the 90s).
Going by those statements, we come to the following conclusion:
RahXephon = (Ideon + Devilman + 2Reideen)/4
Anime, ladies and gentlemen.