So all the primarchs we currently know of are themed (and apparently have a 'wyrd' which names their theme, but this might just be the way that Fenrisian culture describes them rather than being the galactic hard-and-fast rule).

Anyway, they are all also supposed to be different reflections of the Emperor and his abilities/characteristics/personality.

So whats missing? We have a few different ideas on militant marshals, (Guilleman, Horus, Johnson, Sanguinius), Seige makers/breakers (Dorn, Perturabo), Psychic man (Magnus), Barbarian types (Russ the executioner/ Angron the, well angry), Mechanical/creative mans (Manus and Vulcan), Intelligence sneaky mans (Alpharius/Omegon), perfection man (Fulgrim), Batman (Night Haunter), fantaic-man (Lorger), wild riding fast hunting man (Khan) and sneaky shadow fast hunting man (Corax).

So, whats missing? What would make a good wyrd/theme for the other two that are missing. That is more interesting than "The one that got lost" and "The one that's busy doing other things".