The address of the beach house, 45 Lampkin Lane, is a reference to the Halloween franchise. It's Micheal Myers' address.
This will be the prelude to Season 3 as Scream was renewed for a season 3 by MTV on Friday 14th October 2016.
This episode draws several parallels to classic horror movies. Like The original scream movies, I Know What You Did Last Summer, there's a homage to Texas Chainsaw Massacre while the Lakewood 5 are in Alex's van.
The actual finale of Season 2
This episode is named after Halloween (1978)