Nas teased several installments of Lost Tapes after he dropped Lost Tapes 2. I don't think he's done releasing those especially with Def Jam saying they wanted to continue to working with Nas. Lost Tapes would be their only connection to him as Lost Tapes 2 was a Def Jam and Mass Appeal release even though Nasir ended his contract with them. I don't think anything he's done with HitBoy would be on a Lost Tapes unless its some pre King's Disease sessions. Nas talked about a Lost Tapes 3 being all features, so there were at least plans to release another one.
All true. Well, we know for sure that we won't see another installment too soon since he and hit Boi are on a fukkin rampage!