I have no idea whether or not this is unpopular (kinda ties into what I'm about to say, really) BUT:
Inkling's ''reveal'' was the most underwhelming of all the newcomers, by far. Since it was tied in with the whole game's annoucement, it was very forgettable that they were playable characters. They didn't get a proper trailer that built hype for them... hell, they didn't even even get the iconic splash screen. Many many times over I went like ''Oh yeah those guys are in too'' before the game came out... and I am a huge Splatoon fan that sunk in well over 2500 hours across Splatoon 1 and 2
The hype was much more for the game itself instead of being the character, which kinda sucks, since Splatoon turned out to become a really huge thing, especially for a game that came out when the Wii U was pretty much dead.