User blog comment:Rafe Adler/SPN Spinoff?/@comment-79.115.69.167-20160911185641/@comment-1975828-20160913013507

1) All the actors need to have spare time to appear in the spin-off.

2) There needs to be enough money to afford the actors, the set, the crew, etc.

3) I personally find the Supernatural universe to be so complex it makes no sense, with a lot of retcons and plot holes from season 1 to 11. A non-human centered spin-off would likely only make a bigger mess of the universe.

4) Just to point out, Michael doesn't actually have a proper vessel. Matt is John Winchester, Jake is Adam. Mark is Nick but he is mainly Lucifer. My point is, I think for Michael, they might need a new actor.

These are just things I worry about, but maybe, they're not something to worry about. We'll see.