Dr Dre Talking to My Diary was previewed in a HP ad in 2010, the song came out in 2015

Migos Stir Fry from 2018 was made for a TI song in 2008

Bath Salts from DMX album this year being previewed in 2017

Also Skyscrapers from DMX album originally featuring Kanye and Swizz himself previewed in 2012!

Complex hire me my email is ashrodriguezbusiness@​gmail.com I'm not gonna flex n go in depth here but I got ideas for articles for dayssss

Hook bro up he keeps begging for a job with yall @YoungNastyShawty

mona lisa

dr dre fell off, now he need a job for complex

Nah that ain't the narrative, never begging. Putting it out in the universe tho. N to be fair I'll go more in depth with the threads to prove my worth n also actually reach out to them

Most of C5 tbh.

Yeah but I'm looking for examples with evidence, like on YouTube for example. All examples in OP have videos on YouTube. I know a snippet of Mona Lisa was around for years before it dropped, anything else?

2Pac's posthumous catalog.

It's crazy how Pac was forbidden to using the sample to Changes when he was alive but Bruce changed his position after he passed.

I saw a video of Kanye making RoboCop in 2003

all of SRS i think

Travis Scott blue pill previewed in 2014
Released September 2017

only like 5 songs not countin deluxe

Yeah man, i'm tired of that fake love.

Touche

Young Thug - Personal (prod. Cassius Jay & Wheezy)

previewed 2016, Cassius finally drops it tonight

Thugs part is from a 2014-2015 leak and Keed dropped a remix to it in 2019. Thug even says free La Flare in the chorus

mona lisa, open letter, hittas, famous, open safe, and most of let it all work out.
then deluxe scottie, holy, f him good, lomc, siri, half of more to the story.

can u be

A lot of Late Registration songs

Hey mama is the first song that came to mind with this thread