If the Rangers win a Cup in his tenure, then I think that makes it a whole lot more likely, but as it stands now, not close enough as many have pointed out.
While he's moving up the franchise charts (needs one more goal to tie original Ranger Bill Cook for 10th all time in Goal Scoring) and now holds franchise records for single season records for PP Goals - 25, Game Winners - 10 and possibly also beating Jagr's 54 goals, I think he has to be part of something bigger to cement his legacy.
His 50 goals this season does stand out from his previous years, though he probably would have come close to, or broken 30 goals in each of his previous two seasons if they had been normal ones, and as such it feels a little exaggerated, but clearly his consistency this year has been so much better.
If he doesn't win a Cup, but he plays out his contract, then he could become just the 4th Ranger to reach 1000 games with the team, he could well be the playoff game leader at that point (passing Henrik Lundqvist) and could well move into second all time in goals (think the 406 from Rod Gilbert, which is 179 more than he has now is too far).
That might be enough, because the guys around him would all have had their numbers retired.
Of course that assumes that Kreider stays healthy and productive into his early and mid thirties....soooo, I guess we'll see