You're about to be told that every single guy Detroit has drafted in rounds 1 to 3 is all but guaranteed to be a full time NHLer.
The answer is always the same... 2 guys are killing it in Raymond and Seider. The rest are rookies or completely unproven at NHL level while being good at their current level (or excelling at it). When they all arrive, Detroit will be a contender for many years. Guys like Petry. Holl and Chariot will be long gone (Larkin will still be 27 and elite though).
Because they will all be good, then UFA's will want to come and Yzerman will sign/trade several top end guys to complete it. Then, bam, Stanley Cup is back in motown in 2027. Cossa is the starter. Seider, Erv and Asp are the base of an insane D core. Raymond/Kaspar/31 year old Larkin will be leading the offence. The rest of the guys will fill in those bottom pairings and lines. UFAs will do the rest.