err, semis probably- the problems would obviously come on the bench- a few iffy players in there too- Mealamu, SBW, Messam etc are a bit shaky atm.
A few teams could play this game too though- a utopian world of no injuries greatly broadens this possibility.
I can only say for England, but:
Marler, Youngs, Wilson, Attwood, Lawes, Wood, Robshaw, Morgan, Youngs, Ford, Yarde, Barrett, Tuilagi, May, Brown
Webber, Corbisiero, Brookes, Kruis, Itoje, Wigglesworth, Cipriani, twelvetrees, Wade
Vunipola, Hartley, Cole, Launch, Parling, Haskell, Kvesic, Vunipola, Care, Farrell, Nowell, Burrell, Joseph, Roko, Foden
George, Mullen, Thomas, Slater, Ewers, Simpson, Slade, Watson
with a fair amount of room to spare... I'd venture to say that's better quality in depth in the forwards than NZ actually.