Cardano's updated Dijkstra roadmap still points to a two-step rollout stretching into Q2 2027, with Phase 1 framed around Q4 2026 to deliver Linear Leios, Nested Transactions, new serialization structures and PlutusV4 changes, and Ouroboros Peras set for activation in a separate later hard fork. Cardano's latest roadmap reiterates that the Q4 2026 milestone is a code-completion and mainnet-readiness target tied to Protocol Version 12 rather than a guaranteed activation date, while actual deployment would still require on-chain governance approval. The second phase remains aimed at an internal hard fork in Q2 2027 to activate Ouroboros Peras, which is intended to improve transaction finality speed.