The Butterfly Villain is going to be named "The Monarch''.And we're totally going to make The Venture Bros. jokes.
The cycle of unrequited love is a result of Chat Noir's and Ladybug's bad/good luck powers.Chat Noir is infatuated with Ladybug, but his bad luck makes it so that he can't recognise her without her costume, making her more inaccessible. Marinette is infatuated with this blonde guy at school - but his bad luck makes it so that he doesn't recognise her out of costume and just considers her annoying. Her luck powers, however, compensate by making him infatuated with her in-costume - even if she's too besotted with the blonde guy at school to take notice. Basically, it's a cycle...sort of.
Chat Noir's name is Felix.Because a) it's a common cat name and b) it's ironic, considering the meaning of the word.
The mime villain will defeat Ladybug badly at some point.Considering his seemingly-broken shadow powers, he may cause our heroine to need very urgent rescuing.
The Butterfly villain is related to Ladybug.Specifically, he's her grandfather. She inherited her ladybug earrings from her grandmother, but her grandfather hasn't been mentioned yet...