It's pretty well accepted that PLA plan is to have 6 carriers by 2035. Given this timeline, it's not ridiculous at all that by 2025, the 4th carrier will come out, by 2030, the 5th, and 2035 the 6th. If you don't think this timeline is credible, then when do you think 004 will come out and when will it be in service then?
Why wouldn't the 003 be ready for service by 2025? It's taken 001 4 years from launch to service (2012-2016). Why wouldn't we expect a similar timeframe for 003?
Also, even if it's not in service, it doesn't mean it won't be carrying mostly FC31s. I mean, the 002 is not in service right now. But it's sure carrying a lot of J-15s. Correctly if I'm wrong, but I believe the last time we saw a serialized J-15, it was in the 60s.