Kasai Tomomi - She's finally 18. She's incredibly hot. And she's with Horipro, who I happen to know for a fact can put together an amazing PB.
Umeda Ayaka - She's pretty, and has very nice legs.
Yonezawa Rumi - This is one that I'm pretty sure won't happen. But she is very pretty, and I would love to see one.
Of course, what I'm really hoping for is that TomoCawaii Vol 3. is a joint TomoTomo PB.