u/Commorrite

I'm realy drawn the the mix and match list building these two facitons enable.

I'm aware some stuff simply can't cross between systems, but with the new intercesors having mixed armour marks and thus bluring the first born primaris distinction... Could the Vehciles Dreadnaughts and genric marines be a shared model pool...

My idea is to make characters be system specific but a marine in black armour with a bolter? could that be used in both? Terminators are just Terminators ect

Is there a huge catch i'm missing?