yea probably, interested to see how sumni will do in the long run, shinee is already falling
I dont think sunmi will do well, considering:
1) Her last few releases were doing quite badly as compared to Gashina, Heroine and Siren. Though i think lalalay, pporappipam are deserved to be popular. Her last popular release is duet with JYP.
2) Tail is more of a performance song. It is not as catchy as those i mentioned above.
I hope im wrong though.