They stated last year they were interested in exploring the 80s further, so this year isn't a surprise.
Older properties are also cheaper. It gives them a bit more leverage to go after bigger names (like their pursuit of Game of Thrones).
That said, Orlando is less 80s this year than last. They have Stranger Things, Ghostbusters, Killer Klowns, and... That's kinda it.
House of Thousand Corpses/Rob Zombie are 90s. Universal Monsters are timeless. Zombieland is 2010s. Sure, Depths of Fear is 80s-inspired, but not directly connected so far. Maybe the Graveyard house will be connected to the 80s, but I doubt it.