2013, the average age of pre-debut Seventeen was still 17 years old.
The average age of NCT Dream (per 2016) is 16 years old.
If Seventeen debuted in 2013, there's a possibility that they wouldn't go with the bright concept..
But they postponed it and debuted with a bright concept a few years later.
I really think Seventeen would have similar vibes to NCT Dream if they debuted sooner..
Seventeen were revealed to public since 2012 and there were a lot of articles about them, it was possible for them to debut around that year. The pictures below were taken in 2013, all of the members were still underage.
gif credits-Baby Soon
Seventeen in 2015
-They're just a bunch of babiesㅠㅠㅠ
-Whoa.. They look so cuteㅠㅠ
-Those babies have turned into grown up men now..
-I've been waiting for their debut since 2013ㅠㅠㅠ It's been a long time since the last time I've seen those picturesㅠㅠ
-Chan-ahㅠㅠㅠ You're hurting this noona's heart..
-I remember they appeared as Hello Venus back dancers for a performance, they were so handsome..
-They're just a bunch of babies.. Especially the maknae..ㅠㅠ Vernon is unbelievable..
-If it was taken in 2013, that means that Chan was still 15 years old back thenㅋㅋㅋ He's literally a babyㅋㅋㅋ
-I love you, Seventeen..
-Thanks for debuting, Seventeen<3
-That day was seriously their legendary day ever.. Their stage that day brought me to the diamond life..
-Underageteen.. Chan is still a babyㅠㅠㅠ
-I recall being so shocked when I first saw Jeonghan, he looked so fresh and cute back then.. So freaking handsome.. Anyway, Hansol literally looked like a baby in those pictures..
-Hul.. Jeonghan.. Joshua..
-Ahㅠㅠ I'm so grateful for the fact that they have debuted as Seventeen nowㅠㅠ
-They sure have grown up alot..
-They're still babies in my eyes, even now..ㅠㅠ
-Hul.. Dino.. he looked like a baby back then.. He's still a baby now, though..
-Whoa.. They were so young.. A lot of things have changed in two years..
-My friend started liking Seventeen since they were still traineesㅋㅋ She always go to their concerts and stuffs, that's how I know Seventeen.. Now that I see Seventeen gaining a big popularity and attention, I feel like a proud mom.. I'm so happy..
-Sebongs..ㅠㅠ You're so cool..ㅠㅠ
-My babies are so cute..