they've already done a lunch box and bobble head
NV had bunch of poker chips and a deck of cards
I hope for a energy weapon replica statue (as much as a real weapon replica would be neat too i don't think they could ship those around too easily)
or if instead of like fallout 3 where everything was boxed up in a lunchbox , if everything was boxed up in a hollowed out mini nuke
or a statue of power armour and having it standing over the closed vault door of 111