Elayne was just only recently cast so she’s definitely season 2. I believe someone said during a Q&A on Instagram that season 1 is going to have events from both the first and second books so they are definitely mixing things up.
If they were going to mess with the timeline anyways then why not leave the main characters as Jordan depicted and move the Seanchan story as a giant arc splitting time with the Moraine arc. Making Tuon their Daenerys plotline would have solved their diversity issue once and for all.
But of course they couldn't do that because they have no vision for the story since I guarantee you the showrunners never read the books.
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