petratine "cyrano de bergerac" au - peter (or another EV guy) is in love with the hot + talented petra but can't express it directly for whatever reason, so he enlists valentine to write petra love letters. in the process, valentine starts to fall for petra herself.

petra fights a duel for valentines hand in marriage

valentine - not ender, not peter - is the wiggin sibling sent to space. (meanwhile, peter and ender get up to hijinks back on earth.)

ender stays on the lake, bean has to command the fleet

ender stays on the lake, something bad happens to bean, alai has to command the fleet

peter and valentine "role swap" where valentine is the sibling who torments ender and peter protects him