Finishing near the bottom of the league ensures nothing. Since the lockout we have had 5 different champions, and only two of those teams were built largely around the draft. Even Chicago isn't built solely on their top picks, Kane and Toews were very high picks, but they also added plenty of talent with later draft picks and good trades. Keith, Sharp, Hossa, Byfuglien, Versteeg, Bolland, Ladd, and Hjarmlsson were all either traded for, signed or taken after the first round and were huge parts of the Hawks cup win. Also, there are a bunch of teams that have tried the hit rock bottom approach and have failed miserably. Florida, Columbus, St.Louis, Phoenix, and Atlanta have finished outside the playoffs and in the bottom third of the league several times in the past few years and have yet to look like contenders. Atlanta even had two of the most productive drafted players of the 90's and still have 0 playoff games won in their franchise history.
Pittsburgh got extremely lucky to get where they are. In 2005 it was an open lottery for Crosby, and without that I doubt Pittsburgh has a cup win since the lock out. They drafted either first or second in the draft in 4 straight drafts which is unheard of, and no amount of planning could accomplish that. The only team that has ever done anything comparable was Quebec, who drafted 1st overall three years in a row. Colorado went on to win the cup years later, but do you know how many of those first overall picks have cup rings? yup thats right, 0! They were all traded away.
Finally out of all the teams in recent years to be considered up and comers because of their drafted talent (NYI, TB, EDM, COL, LA) you can almost guarantee that not all of them, maybe not any o them, will win cups anytime in the next ten years.