Piff Perkins
Veteran
The Pete Rock tracks are actually new tracks that were recorded specifically for Lost Tapes 2 around 2011. They were to be included on the Def Jam LT2 before Nas and Def Jam had a falling out.
The RZA produced tracks, from guessing (using Nas interviews from around the period) are from around 2013-15. These are beats that RZA sent Nas for the Life Is Good followup that never materialized. RZA said that Nas and a few other rappers of note came to his crib and he basically gave Nas about 50 beats.
Nas has not officially rapped over RZA production thats not Verbal Intercourse or Let My nikkas Live.
Statik Selectah and Nas have worked together before. They had a song slated to appear on Life Is Good but it didn’t make the cut due to sample clearences.
I think the RZA stuff could also be from 2010, during the Hawaii sessions for MBDTF. They started working at that point on what they thought would be a new Nas album. Just a few tracks apparently.
It could also be something new-ish, from the last couple years. There was talk of Nas, RZA, and Swizz having some type of project. I'd imagine they're joints from whatever the Nas Album Done/2016 era album was.