The new LCD model will be iPhone 9
iPhone X will keep the name, since only a small internal update
iPhone X Plus for the big OLED model
I think the ‘iPhone 9’ could still be fitting, I’m curious to see how they will label the 6.1 LCD iPhone, as I think the 5.8/6.5 iPhones might be a little bit more obvious with its title, but three new iPhones alone should be interesting how they all correlate together in Apples terminology.