What second aisle? It is going to be single aisle throughout the entire plane like a 757.

I will assume it is just the same Polaris suites and layout with one aisle, meaning no middle suites. Don't know if the suites are going to be able to be wider like 777 or narrower like a 787. For Premium Plus, it'll just be 2-2 since the current PP seats are pretty similar to the newest domestic first seats. Eco and Eco Plus will be standard 3-3. I suspect the seats will be 18" width as the Airbus cabins are wide enough to do 3-3 with that generous width (by today's tight standards). We shall see what the pitch is in E+, probably the new 34" standard. 31" standard in E-.