So who do we have so far?
ULTIMATE X-MEN (Earth-6160)
1. Maystorm (Storm counterpart)
THE ASSEMBLY (Earth-616)
2. Cadet Marvel (Captain Marvel counterpart)
3. Hellrune (Thor counterpart)
4. Liberty (Captain America counterpart)
5. Moon Squire (Moon Knight counterpart)
6. Titan (Hulk counterpart)
My best guess would be that these New Champions variant covers were an artist-led initiative to design new characters.
The writers could then choose whichever designs they found most interesting to use in their stories.
Momoko took Maystorm with her to Ultimate X-Men.
Foxe is using some of them as members of The Assembly, which is obviously a Hydra programme of some sort.
Either the Assemblers were wholly manufactured by Hydra, or they were human kids transformed into "superheroes".
We'll have to wait and see if any of the other designs pop up anywhere.
I loved Fantasma, the roller derby sailor scout Ghost Rider by Luciano Vecchio. But I don’t imagine she’d fit in with Ben Percy’s Ghost Rider stuff at the moment.
From what I remember when the covers were rolling out, the artists were given rough pitches for character concepts but were otherwise given free rein.