New Nikon Z9 flagship?

A Z 400mm f/2.8 makes sense and is needed. Nikon's current model is 8.36 lbs., while Sony is 6.37 lbs. and Canon is 6.25 lbs. The difference between Nikon and Canon is quite dramatic. I have the current Nikon model and had just about decided to sell it when this new rumor arrived. The new model will be expensive, but I bought my 400mm used for a very good price. I will just be moving about what I paid to the new lens. I have to say, though, Canon and Sony are looking really good right now. Nikon not so much.