Opening the Time Portal to the Past/The heroes secretly followed them

Here is how the Time Portal to the Past opens in The Overlord's Revenge.

Soon enough, Po, SpongeBob, Emmet, Wyldstyle, Batman, Gandalf, Laval, Lloyd and the others caught up to them.

Emmet Brickowski: (whispers) There they are!

Po: (whispers) What do you guys think he's doing?

Worriz: (whispers) I don't know, Po. But I've got a bad feeling about this.

Batman: (whispers) You and me both.

SpongeBob SquarePants: (whispers) I think they're going to open the portal of some sort.

And he was right, Lord Vortech and the Overlord make ready to cast the spell.

Lord Vortech: The Time Portal of the Past is about to open.

The Overlord: Yes, it's time we change the future that will be ours!

Eris: (whispers) We can't let them change time!

Kai: (whispers) But we can't let them see us!

Gandalf: (whispers) What is your plan, SpongeBob?

SpongeBob SquarePants: (whispers) Once they open the portal, we'll follow them to the past unseen.

Patrick Star: (whispers) Gotcha.

At last, Lord Vortech was ready to open the Time Portal to the Past.

Lord Vortech: Open the Portal to our destiny!

Emmet Brickowski: (whispers) Now's our chance, come on!

At last, they all secretly followed them to the past.