So, guys here's what we talked about with Katy Perry on March 20th (With my studies I didn't have the time to post i'm sorry
) :
For the next album, she doesn't want to work with one/two producers. She actually wants to record the same song with a bunch of producers so one song could have a slow/dance/rock version (she didn't say "slow/dance..." but that's what she meant, she talked about different versions with different rhythms) and she'd choose the one she likes the most.
Then I talked about a December release (I heard this on the internet ?) and she said nothing is planned yet. It just depends on her inspiration because songs are not written yet (some are tho) and she wants to take her time. It could be according to her sooner that December or later, it just depends on how things are going and couldn't say much about that as she doesn't control her inspiration. However, she has the concept so that's why it could go really fast from now on.