I doubt Taeyeon is going down the same EDM route the other soloists went with. The hoe doesn't dance like at all so at MOST it will be a synthpop/electro ballad.
Wish the teasers had more oomph to their visuals but SM is obsessed with that basic monotonous colour+Arial bold font this year
I like how all the solos have matching aesthetics. It's cute and I'm glad SM is acknowledging the fact that all their releases are similar this year. Otherwise it would just seem cheap, but with the matching visuals it passes as a "theme".