The idea of a song like "Timeless" featuring The Weeknd and Playboi Carti sounds like a track that could merge their unique styles into something atmospheric and high-energy.

A preview of a track like this might feature:

The Weeknd coming in with his signature haunting vocals, singing about love, desire, or the fleeting nature of time, over an ethereal and moody instrumental.

Playboi Carti bringing an energetic, chaotic vibe with his ad-libs, high-pitched flows, and catchy, almost hypnotic, repetition, adding a contrast to The Weeknd’s smoother delivery.

The production would likely feature dark, atmospheric synths, with heavy 808s, and possibly experimental trap beats that build tension, with a spacey, almost futuristic sound.

Together, the blend of The Weeknd’s melodic lines and Carti’s eccentric flow could make for a uniquely "timeless" listening experience that keeps evolving with each verse.