They can't handle the hunt.
Definitely, on this topic and about Duck Hunt getting a reboot I do have a few issues that differ Pit and Duck Hunt. First off, Pit was almost a main character in Brawl, he was one of the main fighters in the SSE, was unlocked from the start and was on the front cover and a lot of the trailers, despite not many people knowing about him. Pit was all over the place and a ton of people learnt who Pit was from Brawl, thus he could be changed freely from the original game in to a new style.
DHD on the other hand, was in one trailer, and is kept on the down-low. People also know who the Duck Hunt dog is anyway, he's fairly infamous in gaming and anyone with knowledge of retro gaming knows who he is, he's not like Pit or Takamaru or any other of those who are under an extreme "literally who" status. This is where issues come in, people know the gameplay of Duck Hunt, and their may be backlash if it differs from the original gameplay and style too much, even if Duck Hunt was a very basic game. Not to say I don't support a Duck Hunt: Uprising, but there are more issues with it.