AFAIK, Kuznetsov had max waterline beam of 38 meters. It's empty displacement was 43 000 tons. It's full displacement was 59 000 tons and its maximum overload displacement by design was 65 000.
We can also use QE class for comparison. 39 meter waterline beam. Full displacement 65 000 tons, maximum future displacement (design allowance) 70 600 tons. We have some data available to estimate empty displacement, like the fact the ship can carry at least 4000 tons of ballast water. Without fuel, planes, crew, supplies etc the empty displacement should be around 50 thousand.
Forrestal carrier, 39.4 meter waterline beam. 57-62 000 tons empty displacement (I found different figures for it). 82 000 tons full displacement.
Hull design and length, of course, also influences the displacement. The trend in carrier design seems to be to increase the width to length ratio.
Besides the fact the resolution of the photos isn't enough to discern if we're looking at 39 or 42 meter beam, nor if we're looking at the widest part of the ship, there's the fact that we may not be looking at the waterline level.
It's very hard to get exact figures from images for that widening from waterline to hangar level but here are some rough approximations: Nimitz grew by 1%, QE by 2.5% and Kuznetsov by 4.5%.
4% increase would be enough to move a 39 m waterline beam to 40.5 meters at the level of the hangar deck.
Basically, nothing is confirmed yet. It could very well happen that this third carrier uses a hull base very much derived from the Liaoning's sistership. But with internal structure, hangar, main deck and island wholly redesigned. Or that the basis is similar but ever so slightly enlarged in some sense. Increasing the waterline beam by just a meter, from 38 to 39 (true 1 m resolution is not available to us yet in those photos) could mean 5000 tons of additional displacement. (Or a different figure, depending on length, hull shape etc)