Indeed a very pretty Shinji.
Seems to be the same "red room" as the earlier Misato/Gendo shots. Maybe inside a core? something made out of core?
Maybe a "last temptation" type situation where Gendo is like "join me". This look here is Shinji being tempted for 5 min but then he gets that determined look from the other trailer. Or the other way around who knows
I'm not worried about the rating tbh, EVA has crossed into bein a classic and probably gets the "its not porn its art" treatment at this point.
So maybe no anatomically correct giant vaginas but once you've done them already there'd be no point in repeating it