In order to defeat Amara, Chuck will have to make good and evil work together, a feat rarely, if never, achieved. But could God pull it off? His attempt to do so will unfold in "Supernatural" season 11, episode 22.

In the penultimate episode, titled "We Happy Few," Chuck summons the opposing forces believing this will help him win against her sister in what the "Supernatural" season 11 promo dubbed as the "biblical battle royale."

Sam warns Chuck that it won't be easy to bring together angels and demons, like God himself did not know that already. But he is doing the impossible here in "Supernatural" season 11, episode 22.

Crowley appears to be interested with the team-up. It remains to be seen if he will ever come through, but with Chuck's renewed motivation to stop Amara and the Winchesters never been more ready to clean up this mess, this alliance is going to be forged one way or another.

Besides, Amara is threatening to erase the very existence of each of them. This is why heaven and hell will have to best buds for now. It won't matter when they are all wiped out by Amara anyway. This makes it clearer why Crowley is ready for the unlikely team-up.

But the real surprising bit about "Supernatural" season 11, episode 22 is not the good and bad forces coming together for one cause but the return of Rowena.

The synopsis for the "Supernatural" season 11 episode only teases that the witch is about to make her move. Whether it is against the Winchesters or not, remains to be seen.

Interestingly, the promotional photos from next week's installment teases that she might be on God's team after all. However, there's still the mystery of what brought her back in the first place.

"Supernatural" season 11, episode 22 "We Happy Few" airs May 18 at May 18 at 9 p.m. ET on The CW. The finale titled "Alpha and Omega" hits the small screen on May 25.