I think I'm gonna be that odd one out and say that Crash Twinsanity was my favorite Crash Bandicoot game game. Yes. It was probably the shortest compared to others, but seeing them add a Jak & Daxter like gameplay yet keeping that same Crash feeling with such a wacky storyline really made my day when I first played it. So I'm busy trying to see if there is a copy of it somewhere, sleeping with the dust bunnies on an untouched shelf (or Ebay).
As for Crash on PS4, hate to say it, but the owners are possibly trying to keep the classics on the shelf. Haven't heard any words about Crash Bandicoot and a new game so I think they're just trying to forget about the whole thing..Then again, they could be taking a step into surprising us fans into introducing a new (And hopefully, good) continuation to our beloved series. So in a nutshell, I don't have a clue and I'm trying to think on both sides of the situation here. Only time (and power crystals) will tell of the fate of our beloved Bandicoot.
I love the series. Seriously do.