Complex sentence: After the airing of various vignettes, it was announced that Emmalina would debut on the 12 December episode of the brand, at the episode, she did not appear and instead another vignette was aired re-teasing her debut.
Split into simpler sentences: After the airing of various vignettes, it was announced that Emmalina would debut on the 12 December episode of the brand. At the episode, she did not appear and instead another vignette was aired re-teasing her debut.