I'm hoping for Buzzsaws and those wheels that replace the lower body. Also perhaps Pile Bunkers, not sure if its an actual weapon though. Also for Stormboy's there should be an option to get something similar to Zagstruk's legs, which depending on the lore are either Power Klaws or or just similar to them. http://wh40k.lexicanum.com/wiki/Zagstruk#.U_0RG_ldVM1
Eh, as cool as klaw feet would be, that's kinda Da Vulcha's gig, isn't it? Gitfindas would be great, and look real snazzy too. Here's hoping Flash Gitz make it into this game.
Buzzsaws as a weapon a perk for maybe stormboys to replace their jetpak with a wheel engine thing and gitz findas which give you a slight auto-aim. Also cybork bodies anyone I want my extra health and sheilds here