Simplify the following text for a Grade 12 native English-speaking person.
Original: and ECW superstars began to appear on each others shows as part of a ( kayfabe ) deal between then-ECW General Manager Armando Estrada and then-SmackDown General Manager Vickie Guerrero .
Simplified: and ECW superstars began to appear on both shows as part of a ( kayfabe ) deal between ECW General Manager Armando Estrada and SmackDown General Manager Vickie Guerrero .