None of the rumours for 9th say Lizardmen are getting squatted. Or any other army specifically.
The rumours did say there would be 6 factions, and even that was contested saying wasn't sure if that was right.
Because of there only being 6 rumoured factions, speculators have decided that means Lizards are out, based on some of the 'Exodus' stuff in the End Times fluff.
I would speculate 6 may be a starting number of factions, as they build Warhammer 2.0 (a.k.a Bubblehammer), and more could get added later, as they have time to develop the new ranges, if indeed any of it is true.
the rumours are outrageous if taken at face value. They did first appear around the middle of last year as the so called "Spanish Rumours", not in as much detail as there is currently, but that Warhammer was ending and a new version of the world and rules was taking it's name and place. People were hugely dismissive of the rumours back then. Including some of those people who have now said the same rumours and have had to concede there might have been some truth to them.
There are several ways this could go
1) GW are giving certain people knowledge of certain things and trying to figure out where they are leaking inside info from.
2) GW are putting out false rumours, as each edition change people get enraged over changes, so they're putting out such outrageous rumours that when 9th does arrive and not much has changed people will be relieved, and happy to continue buying
3) There is a divide within GW over the way to take Warhammer forward, and people who don't like the changes are leaking information knowing people will hate what is coming, to prove their point
4) GW just don't care, as WFB doesn't do well enough or attract enough payers that pissing people off won't matter, and they think they can attract more than enough new people to buy into the replacement
5) Maybe there just aren't enough people within GW who like WFB, they're 40 players, so want to make WFB more like 40k, so they think more people will like the new WFBubbles
6) GW have no idea why people do or don't like WFB, as they don't do any market research (Or so they say in their annual report), so everything they do is a complete guess and they just hope it works, but ave no idea why or how to repsond to demand, or judge what people might actually want
7) Rumour makers are making shit up to provoke a reaction, though given how this could harm GW, you might think they would say something