What you can expect is the Gundam Seed Destiny formula.
In other words, new replacement characters very similar to old ones, yet they are still overshadowed by the old surviving characters.
Also its not a Gundam thread without a troll so I'll add that this Gundam series fuckin blows. Also there hasn't a good Gundam series since 8 MS Team.
inb4 raaaaaaage, quote amendments, no u, and ect.