I guessed it before with Tzuyu (I thought it would either be her or Jeongyeon), so I wanted to share my thoughts, so I could later see if I was right Maybe I'm looking into this too much, but I do believe they're dropping hints in this comeback for it.
JYP likes to tease Twice's solo debuts in their MVs. Nayeon's solo debut was teased in Scientist, Misamo in Moonlight Sunrise, Jihyo in Hare Hare. Then I think both Misamo and Tzuyu were teased in One Spark. I'm not sure about Nayeon's 2nd mini, maybe I didn't notice anything or it wasn't planned so early.
Now, after watching Strategy, I think Chaeyoung's solo is being teased there!
She not only has a lot of spotlight in the MV (definitely more than in the previous comebacks) but also her symbol, strawberry is kind of present in the comeback and she's in the middle of a few teaser pcs. and my intuition tells me it might be teasing.
So she has a lot of screentime in Strategy but also people have been posting this - all the targets have knives either in the middle or on nine, but one has it on 8 and Chaeyoung is the 8th member in the group.
She starts the song and also, at the end, there's this magazine shown and Chaeyoung is the last Twice member to be shown there. And on her page there's this sentence "Chaeyoung shines on her own". Other members have some normal text, mostly about love.
Here, she's in the middle of some promo photos and she's either separated a little from the rest, or in between Tzuyu and Nayeon (who had solos this year):
Before Tzuyu's solo debut, she did a lot of activites and tiktoks with Jihyo, as if Jihyo was passing the "torch" to her. Now Tzuyu is holding a strawberry, as if she was passing it to Chaeyoung (strawberry in the fandom is generally connected to Chae, who has a nickname strawberry princess and loves strawberries):
What do you all think? If you're familiar with Twice teasing things in the past, do you agree with me?