Before any of these happen we have to buy the **** out of ICMG in order to help alleviate some Hasbro fears that he will be another Yarna. If he peg warms kiss the really obscure goodbye.
As Adam pointed out Lucasfilm is the one that is saying no to the sisters being made. That may change since one of them died. It would be nice that the other release the rights upon her death.

I do not get why people are not satisfied with the grim reality of these being off limits.
Ackmena should be our new ICMG. Bea ruled! I think she has a shot so long as she ranks somewhat strong in the Fan's choice poll and the ICMG does not become Yarna 2.0. I plan on buying 10-15 Willrow for customs/gifts. Maybe more.
So step up people when you see him, he is the key to the next true Fan figure! Buy at least 3 of him. The current "Fan" poll is mostly made up of characters that they would get to anyway, at least 50%. ICMG and Yarna, in my opinion, are the caliber of what that poll should be about and the kind of obscure characters that should be made.
If they are that worried sell a Holiday Special Battle Pack with core characters:
Smiley X-Wing Luke with eyeshadow
Debut Boba Fett
Ackmena
Chewbacca with soft goods red Wookie cult garb.
The above proposed Battle Pack set has it all:
- 3 redeco's and one new sculpt. (Cost efficient!)
-3 Kid focused characters (Satisfies both audiences!)
How could it fail?