Please note that this is a speculation post and infos mentioned down below are NOT confirmed by Electronic Arts!
Also note that the Spooky Stuff the localization tester was mentioning might not be a Stuff Pack at all, but something else!
UPDATE #2: Zerbu was able to find some interesting lines of codes under the ”tag” tuning XML inside the game files. The following code lines were added on November 2014, when The Sims 4 introduced Pools within their new update.
It’s not known yet, but there may have been plans to add Costume Parties and Costumes mentioned down below for Halloween of 2014. Either they didn’t have time to finish this pack or they wanted to introduce it in 2015.[spoiler title=’SPOILER’ style=’default’ collapse_link=’true’]
UPDATE: Marcos removed The Sims 4 Spooky Stuff from his EA projects list!
Marcos de Lima, one of the localisation testers in Madrid for the latest projects and games from EA has listed that he’s been working on many EA projects, including The Sims 4 Spooky Stuff.
It’s unknown when will this pack be announced / released, but I guess it should be expected sometime around Halloween.
This isn’t the first time spooky content for The Sims 4 were mentioned though! Back in July 2014, a screen was leaked during The Sims 4’s Producer Walkthrough video, where among other content ideas, ”a spooky costume party” was also mentioned.