Epic Games is developing a "No Build" Limited Time Mode (LTM) for Fortnite, according to trusted content creator and data miner HYPEX.
This mode would make building—one of Fortnite's core mechanics—optional, easing entry for newcomers intimidated by the steep learning curve. Per the leak, it will run for a limited time only.

Fortnite LTMs are temporary events, not permanent additions. HYPEX calls this a timely feature alongside Chapter Three Season One's Spiderman Mythic and Sliding mechanics.
LTMs typically last a week, forcing veterans to adapt without building. Player feedback has revived popular modes, while others tie to holidays like Fortnitemares, Love Shot, or Ice Storm.
No specifics yet on mechanics or launch date for the "No Build" LTM.