It's great from a collector's standpoint, but unless they seriously improve the number/structure of the levels it'll suffer the same fate as the original, which could be completed in under an hour.
Suffer the same fate as the original? Dude, the NES Duck Tales is widely considered one of the best games on the NES and sold well enough to receive a sequel. All NES games, with the exception of RPGs like Dragon Quest, were about an hour long. Short games are awesome.