Judging from the pattern last time:
That doesn't make sense. If the WS-15 is mature enough for the PLAAF to have the confidence to switch all new J-20s over to it, it's mature enough for early production J-XD. It does make sense. J-20 at least is a well established and proven airframe that's been flying since 2011 in its tech...
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We knew some sort of 6th gen was in the work for a while before November, we didn't know anything about 3 engines or the fact that SAC and CAC each had their own prototype. Around start of November the rumour went from "scattered rumour" stage to more concrete with the above Chahuahui.
Then near the start of December:
Well, I ain't complaining either way. Something big is coming anyways. Well, most likely since I'm not able to read as good as you "between the lines" and understand small subtle hints and even more since too often high expectations have been disappointed I'm still reluctant to put a bottle of...
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We started getting hints from multiple sources (Cute Orca, Ayi, Yankee) that it had three engines.
I don't think with just that one line from Yankee of "they must have heard something" in response to B-21's second prototype flying within the year is sufficient to conclude we've gone from "scattered rumour" to more concrete rumours yet. But it's getting pretty close because recall when talking about the 93 parade Shilao out of the blue also said:
Also, I wonder if J-36 would be able to carry a strike payload of air launched YJ-19s. The main bay is definitely large enough and YJ-19 should be slim enough to fit as well. Shilao and co mentioned that all that development in HCM has made PLAAF realize the need for a new bomber. There's a new...
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Maybe he's heard something too. If we get another source, say Cute Orca or 洞洞 or similar also hinting about upcoming H-20 reveal then I think we might conclude rumours are getting serious. Right now the rumour is at the "above background level, needs monitoring".