Question: what are oberon's plans for titania?
Answer: Oberon plans to use the flower to make Titania fall in love with the first beast she sees. Whilst Puck is searching for the flower, Oberon sees Demetrius being cruel to Helena as she swears her undying love to him. So Oberon tells Puck to use this same flower on Demetrius to make him fall in love with Helena.