When Manning was drafted in 1998, do you think anyone said:
"Hey, I know that Tarik Glenn guy has only played for one season, but he's going to be one of the best LT's of his era, as well as a multiple bro bowler"
"See that short receiver over there with the 88 on? He's going to become one of the greatest receivers in NFL history and will end his career in the number 2 spot on all time receptions"
"See that guy on Miami University? We will draft him next year and he'll be one of the best backs of his era for the 7 years that he plays here"
"See that other guy on Miami University? We will draft him in three years and put him next to that guy in 88 to form one of the greatest receiving duos in NFL history".
No, no one would have ever predicted any of the stuff I just said. It just sort of happened. And no one can predict what will happen with Luck, or what players we will bring here in future years. Most of the guys that Luck will play the bulk of his career with aren't on the team right now. It's pretty pointless to debate on how Luck's career will pan out until we at least see what we do with our cap space next season, as well as future drafts.
If we go something like 2-14 or 3-13 next year, how many people will remember/acknowledge that we went 3-13 in Manning's rookie season? How many will remember/acknowledge that we went a putrid 6-10 in his fourth season?