In the Red Velvet music video, 7 female trainees make an appearance. The one in the red below is the new member Yeri. The rest are under SM Rookies.Just a few months ago, new member Yeri was up on stage at an SM concert with the other trainees (minus Rami).And despite Red Velvet's official debut, the four members are still listed as being under Rookies, adding to the possibility of Red Velvet simply being a rotation group.SM debuted their new rookie group with the intention of catching up to A Pink but that was difficult to begin with because of A Pink's core fandom and the difference in debuts.It then seemed like Red Velvet could become rivals with Lovelyz but Red Velvet randomly went with a 'dark concept' with 'Be Natural'. Lovelyz is now in a rivalry with Girlfriend, which they'll surely benefit off of.As for Red Velvet... in order to survive, they'll either have to go with an f(x) concept or somehow garner way more popularity than Lovelyz and Girlfriend so as to not fall behind but they're in an awkward situation now...They'll basically have to be competing with the new Cube Girls or Kwangsoo's Girls (YG and JYP have postponed their girl group debuts so Red Velvet has some breathing room for now)."They'll still do better than most girl groups just for being under SM.""I'm not worried because worrying about an SM group not doing well is useless. They'll always work out somehow.""Honestly, 'Be Natural' was a risky move for a rookie group. They'll be fine if they come out with another concept like 'Happiness'.""I wouldn't be worried, just look at what SM did with EXO.""Everyone had the same worries with EXO but they're doing fine now. SM artists in general hit it big late in their careers."1. [+310, -27] Whether Yeri joins or not, Joy will forever be my maknae2. [+225, -9] As a fan since their debut, I don't welcome this news at all. They should've debuted the group as five members to begin with, they wouldn't nearly be getting as much as they are now;;; Why start with four and add a new member in between? And Joy was the maknae but now her position's up in the air with Yeri joining... She's so young too, why couldn't they wait until she was a year or two older? I really liked the four member concept, it was unique and it worked.. The girls holding hands in pairs was adorable... Now that they're 5 members, what differentiates them from f(x)? I heard there are rumors of them adding members up to becoming a 7 member group ㅋㅋㅋㅋㅋㅋ What if that actually happens ㅠㅠ3. [+126, -7] I'm not a fan but I don't like this either... What're they going to do about their debut song during concerts? And Joy was the maknae but now suddenly Yeri is...4. [+70, -7] I'm not a fan either and this whole thing is weird ㅋㅋㅋㅋㅋㅋ Now they can't perform 'Happiness' or 'Be Natural'... I don't even know how they thought sticking in a '99er would work with an 8 year age gap with the unni;;;5. [+68, -15] Only Park Sooyoung is the Red Velvet maknae, fu*k6. [+55, -4] I'll be so mad if they put Yeri in the middle just to promote her.7. [+42, -2] Fans are only fans of the four, but if Yeri manages to gain a considerable amount of fans, that will only divide the fandom further... and it'll be like f(x) where they have more individual fans than group fans. Fandom division makes it hopeless for the group to get anything done.8. [+40, -4] I don't hate Yeri, I hate the fact that she's in Red Velvet