This is how making plans goes in Night Furies vs. The Nightmare Family Part 2.

[Our heroes are now in the Everfree Forest]

Thomas: What now?

Fishlegs: We've never faced anyone like them before!

Ruffnut: So, how do we defeat them now, Princess?

Tuffnut: I wanted to say that!

Ruffnut: I already did for you!

Tiuffnut: Why, you...

Princess Celestia: Cut it out! This is no time for arguing!

Ruffnut: Sorry.

Tuffnut: Sorry.

Princess Luna: I believe I might have an idea for how we can stop The Nightmare Family. But we must head for the Castle of the Royal Sisters first.

Snoutlout: The castle of the what?

Princess Celestia: Our old castle, it resides in the Everfree Forest.

Astrid: Well, if it's our only way we can take on these freaks, then I'm willing to go for it.

Hiccup: Same here. Lead on.

[Our heroes head for their old castle as the Princesses lead on]

Snoutlout: I wonder what new things we'll see in this forest be?

Hiccup: I don't know, but we might soon find out.