Like Shesterkin and Samsonov, Sorokin will likely get some AHL time. That will buy you at least a bit into next season, if not the full year.
For me, it's no comparison. If we're looking at a 31 year old starter, a 33 year old late bloomer, and a 22 year old potential starter who has produced at every level he has played at, either the 31 year old or the 33 year old are the odd one out. It's not a slight to Varlamov (who has done admirably) or Greiss (who has done very admirably), but it's a long-term outlook.
Never mind Sorokin even started with the KHL at the ripe old age of 17. He tends to be a bit more aggressive than some of his fellow Russian goaltenders, but he's quick and has great edges. At the time (this was a year or so ago), he had a few things in technique to improve that made me favor Shesterkin over him (and not just being a Rangers fan), but it's been a year or so since. He is an excellent goaltender.
We're talking about as blue chip as you can get for a goaltender.
Great article, though a bit dated at this point.
Sorokin vs Shestyorkin: A Style Comparison - InGoal Magazine