What Apple New Model IPhone its 2018

The introduction of the iPhone X resulted in Apple having three flagship grade iPhones in its 2017 line-up as opposed to its usual two, covering two distinct designs. All the signs point to this changing this year as Apple consolidates its iPhone line-up doubling down on Face ID, gestures and an all-screen design - notch, sadly, included

iPhone 9 and iPhone 9 Plus - Continues the naming convention while providing future flexibility for cascading down in the iPhone range. However, doesn't fully recognize the achievement of the iPhone X and takes a step down from the iPhone X. A rather unlikely option.
iPhone 11 and iPhone 11 Plus - A not-so-smooth transition from the iPhone X reverting back from Roman numerals (until it's 20th anniversary iPhone XX). Provides future flexibility for cascading down in the iPhone range. Doesn't directly recognize the achievement of the iPhone X.
iPhone X and iPhone X Plus or iPhone Xs and iPhone Xs Plus - Celebrates the 'nexus point' that the iPhone X represented. Apple will remain with and embrace the X moniker, as it did in the past with its Mac Operating System (OS X) to celebrate the new path taken by the iPhone X. Problematic for cascading down in the iPhone range, something Apple didn't need to worry about with OS X.
iPhone X 2 and iPhone X 2 Plus - Celebrates the iPhone X. Provides future flexibility for cascading down in the iPhone range. However, the names seem a little convoluted, and we'd envisage some consumers calling it the ten-2.