No matter how much better i feel after seeing that preview, part of me is almost certain that:
At the very least; Ash and Serena will cement themselves in the "Friends and nothing more" category
or
At the very most; Ash will say or do something that will have him and Serena on rocky terms for a while.
At the very least; Ash and Serena will cement themselves in the "Friends and nothing more" category
or
At the very most; Ash will say or do something that will have him and Serena on rocky terms for a while.