Watch out for his latest movie coming out next month.
Literal
Next-month comes-to [attributive-の] his [possessive-の] recent [attributive-の] movie [to-に] attention-do.
やってくる = やる ('do') + くる ('come') = 'come about / arrive / show up.' For an event like a movie release, it means 'hits / arrives.' 注目する ('pay attention to / watch for') takes に for the target of attention. Movie-promotion-style register.