69 to 72 now up for pre-order on Forbidden Planet.
According to the leaks and Fauxhammer:
69 - Domicile Shell
70 - Ironskull's Boyz
71 - Paint
72 - Lord-Commander Bastian Carthalos
Pink Horrors and Blue Horrors I think are pretty different sizes and on different sized bases, I think that's how they are told apart rather than necessarily the colour. Despite the name.
Based on responses to a comment I made the other day, I think this was only ever a thing briefly in AoS once and the colour scheme specific rules sillyness is much more a 40k thing.
Now we have certainty about Beasts and Splitters we TGAers need a faction to fret about rumoured squatting.
We don't know what allies rules will be in 4oS yet. Now Megas aren't new and GW not pushing for everyone to buy them they might not be available to everyone anymore.
They do look very different.
And I can't fully tell but size wise they look a fair bit smaller. Maybe more similar to Kurnoth Hunters than the he newer Treelord/men?
Aleguzzler/mancrusher/chaos Gargants are a cross GA kit.
Hobgrots could be a kit that represents different units in different GAs.
Maybe a Chorf auxiliaries upgrade sprue?
Or it could be model from a unit on an individual sprue for use as a miniature of the month like they did with a Votann and a Rotmire and probably others.