As things stand now, assuming nothing else is a given, here's my Top 6:
1-Glimmer; I'd love to see 2 heads (toy and Filmation)
2-Peekablue; I just love this girl's look and powers! Great color-scheme, too.
3-Queen Angella; an important character and another I'd love to see 2 heads for (again, toy and toon)
4-Sweet Bee; a great character, I'd love to get a helmeted head in addition to her toon look (shoot, three heads coudl work here!)
5-Flutterina; I'm not too proud to say I want a butterfly woman in my collection!
6-Mermista; she's a freaking mermaid! What's not to love?
Honestly, I hope they ALL get made-every Vintage PoP, every major (and many minor) toon character, and yes, several beasts and such. If I don't get a Spirit in MOTUC, I'll be a very unhappy camper. I also NEED Razz, Broom, Kowl, Loo-Kee, Sea Hawk, Arrow, and Catra's panther form.
I'll take as much PoP as I can get. Many of the most exciting possibilities left in the line (for me) are PoP.