nothing bad can happen from returning to the Castle in Reverie. it'll help reaffirm the "Castle" part of its title. i was speculating about this on the CV Wiki and had thought maybe the boss would be the "Forgotten One", since this was once the Bernhard's castle and the game does make plenty of nods to Lament of Innocence and they could turn it into a Titan-like fight. but then Chernabogue mentioned that could be The Creature, since Dr. Frankenstein is mentioned several times in the game. that'd be fitting and perhaps likely as there appear to be more screenshots of the clock tower. both The Creature and the Forgotten One were created by humans though, so perhaps the boss in this game could fulfill both roles? of course, this is all speculation, we have no idea what the evil force that Carmilla was holding back was.
i didn't know about the time machine, interesting. i have to wonder about how many "locations" each DLC will contain.
wouldn't it be cool if they added a mode where you could play as Laura throughout the entire game? i'm looking forward to see how she plays, but it'll be a waste if its only possible to play as her in very limited places in Reverie. when i heard she was playable, i thought "of course", since her avatar is available in Playstation Home, alongside Gabriel's.