Just gonna say my piece, although I question how popular it might be.

If SAM does end up in the game, I'd like to see it as a hybrid bow/spear class. Seamlessly mixing ranged and melee (as a DPS or even a tank) could make for some interesting situations and class mechanics that haven't yet been explored, and katanas were pretty poor weapons anyway. Not to mention, it would avoid the weapon overlap with DRK while also being more true to how samurai actually fought.