The oldest, more innovative and prominent Alt Coins will survive... Litecoin, Peercoin, Primecoin, and a handful more.

All the others, with no innovation, cloned to the hilt with premines / instamines / hidden mines will wither on the vine (ie Cryptsy)
to die a miserable lingering death with nary a whimper of a hype, nor even a whisper of a pump.

"Bring out your dead! Bring out your dead!"