They are virtually guaranteed to be individual figures. My money is on a Quaterly 2 pack for FF/DC and the year end will be the LL figures
2 & 3 wont work as the styles are too different. Maybe FF/DC would have worked as an armour add on earlier in the line, but that has never been the direction they have gone in, so logically they wont start now.
It would be cool to get another vintage head and I hope they go for a LL He Man head without that stupid scar from the tgverse