Vegas: probably either Kaeden Korczak. I knew he could eventually make it as an NHLer but he's been better than I expected or Adin Hill continuing his dominant play. Not as much argument for it being a flash in the pan of excellent play to backstop a cup run that we've seen with a lot of goalies. No real big surprises. Could say W. Karlsson's excellent play but that's a continuation of his excellence in the playoffs.
Anaheim: kinda tough to say. For me a bunch of candidates that aren't overly surprising but still pleasant surprises.
Leo Carlsson: I really though as late as his second preseason game that he should work on his puck management timing on smaller NA ice. He's not as far off from being an elite forward as you'd expect an 18 year old to be. He definitely has some adapting to do in certain situations but in most he thinks the game much faster than most players can. High skill, high iq, big body, great vision, he's the total package. Also the concerns with his skating were massively overblown. When he gets the legs moving he's really fast.
Pavel Mintyukov: another one that I thought wasn't quite ready until the end of preseason. He's got a really diverse set of tools in his kit. Fast, creative, relatively responsible defensively with a blend of physical and positioning based defense with relatively few errors (for a 19 year old), he's probably Anaheim's best PP QB, he sees the whole game really well and he's not afraid to throw the body or absorb physical contact. I will admit it does kind of look like he's been fatigued lately and hasn't been impressing quite as much as he did at the start of the year, but I think he has the makings to be elite.
Radko Gudas: honestly thought he was just a product of Florida's system and wouldn't be much of an improvement to a historically bad Anaheim defense of last year. While I think Cronin has had a lot to do with Anaheim's defensive improvement (not to say the defense is good now but they're not bleeding 45+ shots against a game now), Gudas' presence has helped a lot. Plus he has more goals than last year already and added a lot of physicality to a blue line that really needed it.
Mason McTavish: I was legitimately concerned through preseason and the first couple Ducks games that McTavish just looked lost all the time. I had this feeling that he'd have a sophomore slump but he's turned it around. Shame he's currently injured.
Tristan Luneau: I think everyone agreed that Luneau wasn't ready for the NHL when the season started. But the Ducks couldn't send him to the AHL and didn't want to send him back to juniors. He's had a short run of games where it looks like he's improved massively. He definitely still has rookie things to work on but he doesn't look like an outright liability on an improved NHL blue line. Shows flashes of potential greatness. Maybe won't be at Mintyukov's level but could be just under.