I think WWE should capitalize on this with an ongoing storyline.....
Cena defeats Corbin at Summerslam
Stroman wins the Universal Title at Summerslam when Paul Heyman turns on Lesnar and his other new protege's (Corbin & Big Cass) come out and take out the other competitors. To keep Lesnar & Reigns strong you have Stroman pin Samoa Joe.
The next night on Raw it's announced that Smackdown & Raw have made a trade.....
To Raw - John Cena, Baron Corbin, Luke Harper, Erik Rowan, Charlotte, & B. Lynch
To Smackdown - Jeff Hardy, Matt Hardy, Samoa Joe, Miz, Bayley, & S. Banks
Reigns and Cena are in the ring arguing about who gets a shot at Stroman. Then Heymans new 3 monsters come out and attack them. The Heels stand tall and Heyman says be careful what you ask for gentleman. My 3 new clients are far more dangerous than my previous 1.
Wyatt vs. Balor (Rematch from Summerslam - Balor had won) - During the match Rowan & Harper come out and attack Balor causing the 3 on 1. Then out comes Anderson & Gallows to even the odds. Club vs. Wyatt Family Feud begins.
After Bliss retains at Summerslam she comes out and says she has no equal. Out comes Charlotte & Becky Lynch. They say they beg to differ.
Also have Jason Jordan win the I-C Title at Summerslam.
Smackdown Roster post trade
Top Faces - Nakamura, Hardy's, New Day, Zayn & Owens (Face Turn)
Top Heels - Orton, Mahal, Samoa Joe, Rusev, Miz, The Uso's, and 3 call ups from NXT (B. Roode & The Authors of Pain).
Both Brands have new life. Corbin vs. Cena saga can continue and give him a bigger push then a short Title reign on Smackdown.