Blue Fairy has posted a list of the basic dolls up for pre-order in April.
From the company:
Thank you for visiting Bluefairy.
Announced pre-order doll type in April 2016.
am11.4th April,2016 ~ pm5.8th April,2016
*BF : Lunar
*TF : Patrick, Robin, May
*SF : Ellie, Jaden, Linus
*PF : Roa, Fei, Roel