They should have added some new content. I'm still looking forward to it, though, since I never actually owned the WiiU version.
Usually it feels like games go two ways:
1) Game is released, DLC happens
2a) A year later, "Complete Edition" is released. Standard game's price is dropped, new game, including all DLC, replaces it at original MSRP, sometimes even slightly less.
2b) Years later a remaster happens. All DLC included, plus optimizations, maybe gameplay tweaks, nicer graphics etc. Remaster is original MSRP, again sometimes even less than original MSRP!
But I can't think of a time where a game came out, sold for X price, then years later was ported to another platform (with little to no additions) with a higher price tag. It's probably happened, sure, I just can't think of any.
I mean there are even some cases on PC where a remaster will come out and you'll either get a discount for owning the original or it'll be a free upgrade (Bioshock) but again, not familiar with a publisher actually charging MORE than the original MSRP for a port.