Yes at this stage not even the big shrimps are fully certain what's going to happen after the first 002, however it has been mentioned by some of them once or twice that they personally expect a second 002 class carrier to be built (possibly at DL), before moving to a nuclear carrier.
I would assume those personal rough predictions from them may be due to their own assessments of where the nuclear reactor technology is at in the R&D cycle, and also based on their assessment of the Navy's desire for an additional carrier after 002.
In other words, the important thing to look at would be when the relevant subsystems for a nuclear carrier would be ready, as well as what the Navy's own carrier requirements between the entry of service of 002 and the expected projected entry of service of the first nuclear carrier is.
I personally think all the relevant subsystems and technology for the nuclear carrier will probably be ready around 2025, and given some safe leeway of construction of the hull vs subsystem delivery I agree with your previously stated 2027 launch date for a nuclear carrier as reasonable, with probably a full commissioning into service near the very late 2020s or 2030, assuming no major issues come up in fitting out and trials.
So assuming 002 is launched at about 2020 and commissioned in about 2023 (at the latest), then the Navy will essentially have three carriers to work with (CV-16 Liaoning, CV-17 001A and CV-18 002) until the nuclear carrier enters service which would likely be seven years later. But if the Navy's demands for carrier numbers is greater than that, then it would make good sense to start building a second 002 at or before the first 002 is launched, to enter service around 2026, which would give them four carriers to work with until the first nuclear carrier arrives into service.
But like I said, that depends on the Navy's own projected requirements for just how many carriers they'll want in the mid 2020s to 2030 time frame, as well as how quickly the nuclear carrier's subsystems can be matured. If the nuclear carrier's subsystems can mature faster than expected, then I suppose it is very possible they might choose to go directly to a nuclear carrier after only building a single 002. Or similarly, if the Navy judges three carriers as a sufficient force for their needs between the mid 2020s to 2030, then they might not opt for a second 002 either, and feel comfortable waiting for the nuclear carrier later on.