dude's gonna be back folks.
I said this summer that it's a strong possibility. And unfortunately, I don't think the kids (to date) outside of Sheary (really small sample size) have done enough to change that yet.
I really don't see the Penguins re-signing Kunitz, even if he wants to stick around. The Pens have a ton of young forwards that should be in the NHL, I really don't see Sullivan advocating re-signing Kunitz when all of Wilson, Rust, Sheary, Kuhnhackl, Sundqvist, Guentzel and Sprong should be getting regular minutes next year.
"Being in the NHL" isn't the same thing as being productive top 6/9 forwards. Lets dissect the list you provided.
Wilson: 4 pts in 14 games (that came over a 5 game span), with his 3 most frequently partners (F) being Hornqvist, Cullen and Crosby.
Rust: 4 pts in 12 games, with Bonino, Hagelin and Wilson being his most frequent partners (F).
Sheary: 8 pts in 8 games, with points coming in 6 of those games. Really small sample size. Most frequent partners are: Cullen, Kunitz, Hornqvist.
Kuhnhackl: 2 pts in 10 games, was a HS for what... 3-5 games?
Sundqvist: 10 pts in 12 AHL games, will probably push for NHL icetime at some point this season. But really needs to work on his offensive game. I think it's safe to say most see him as a 3rd/4th line type player.
Guentzel: 13 pts in 13 AHL games. Will probably push for NHL icetime this season. Offensive game will likely be there, but will still probably need some size. Probably an offensive top 6/9 winger if his game translates to the NHL.
Sprong: Will have missed most of this season due to offseason injury. I'm not sure how anyone can say that he "should be getting regular minutes next season" before we even have a chance to see him in camp. If anything, he'll need time in the minors to round out his game after missing half a season this year to do so. And while I also like what he brought many nights he was here last season... he also to an extent reminds me of Bennett. Looks great on the ice, but could never translate that "looks good - sometimes even great" into offensive production. MJ reign and all that... but we need to see a LOT more of him before penciling him in anywhere.
So now... looking at that list... I see Sheary (using an 8 game sample size) and hopefully Guentzel who may be able to produce offensively in a top 9 role going forward. Rust is very good and useful at what he does, but will not do much offensively. Right now Wilson and Kuhnhackl while useful bottom 6 NHLers, are not likely guys management would hang their hats on for doing much other then being bottom 6 depth. And one would think that after what we saw with Bennett for years, that there would be some caution before anointing Sprong. So if management has faith in Sheary (or he proves himself this year), add in Kessel, Hornqvist and Hagelin, that leaves 2 spots open in the top 9 (assuming we're looking solely at the winger spots and not what may happen with Bonino). Do you really think that if Rutherford has the cap space, that he would go into next season depending on Guentzel to hold an important spot, with little behind him to take his place if he needs some more time?
This is why my opinion on this hasn't changed. Unless 2 of Wilson, Sheary, Guentzel or the other kids step up to the point that there's little question about them being able to handle a top 6/9 offensive role, I think there's a strong possibility that Kunitz could get an extension. Especially as we will likely be losing one of those guys in the expansion draft. Maybe they take Bonino/Daley/Pouliot/Schultz, but I'm not going to hold my breath.