As much as I wanna experience new Stellaris content, unless their free weekend is all DLC enabled for free too, the game's DLC is just too expensive.
Even when they're on sale, I feel like I need 3-4 DLC to actually have a significantly different experience in the game, and at $10 a pack, that's $30-40 bucks. Even the oldest larger DLC packs don't go under $10. It's not even like the oldest DLC becomes cheap over time, MegaCorp and Utopia are still at the asking price of $20/$10 (on sale). Those came out in 2017 and 2018, they're well over 5 years old.