Here is how the Villains meet with Zemo in Tino and Sunset Shimmer Chronicles: Legend of the Golden Keyblades.
(it is nighttime around the villains' base)
(we see a figure walk up disable their energy gate)
(this set off an alarm)
Sheer: What's going on?
Adagio Dazzle: Someone's broken in.
Sonata Dusk: Who would be stupid enough to do that.
(they go to the the main entrance and attack the figure who had broken in)
Figure:(grabs Sonata's wrist and elbows her in the face)
Aria Blaze:(attacks him)
(just as Adagio and Grizzle are about to attack him, they stop)
Grizzle:(shocked) Zemo, is that you?
Adagio Dazzle: I'd recognize that face anywhere.
(the figure is revealed to be none other than Helmut Zemo)
Helmut Zemo: I don't see why you attacked me when you didn't recognize me.
(Adagio motions for everyone to lower their weapons)
Spectre: Alright, what's going on here?
Grizzle: Everyone, we'd like you to meet our old friend, Helmut Zemo.
Aria Blaze: It's thanks to this genius we were able to bring down the Avengers and our enemies for a time.
Sonata Dusk: Though, he was thrown in jail.
(everyone nods, except a skeptic Sheer)
Sheer: And how did he get out?
(everyone looks at him)
Helmut Zemo: An incident involving a man wearing a vulture costume.
(everyone is then seen having tea and cake with Zemo)
Grizzle: So what can we do for you, old friend?
Helmut Zemo: I heard you are having hero trouble.
Helmut Zemo: I'm here to help you.
Aria Blaze: This is gonna be good.
Helmut Zemo: I'm going to help you tear them apart - from the inside.
Darla Dimple: Ultron tried that already.
Helmut Zemo: But he didn't get them to actually get into a fight that would get the public to question their loyalties.