1. Heavily discounted 767-200 update
2. Convert MAX9 orders to MAX10
3. MAX200 seating to MAX10
High energy density batteries still need to be produced.
CSeries is now in a good place, specially with OPEC's campaign to raise oil prices, and excellent performance with airlines.
I think it will be Boeing.
Politics and industrial base.
Though riskier as a new build but not much with Saab experience with a new and an in-production Gripen fighter.