As far as I am aware, there is nothing new going on for 2020. Halloscream cost a lot of money and thy obviously haven't made back what they spent on the event yet. From my understanding the park is just getting minor improvements. A new water coaster is rumored as the park has been having problems with Deluge the past couple years. Also, Mt. Slide Hai has been rumored to be removed and the water coaster will take up much more room than Deluge currently does.