I really think it's going to end up being The Furious Five Spinoff and KFP5, mainly because I saw a rumor not long after KFP4 came out that said the Spinoff was coming in 2027
I figured KFP5 would be the movie to come out the year after since I suspect the spin off is going set up the events of 5
I know a lot of people hated 4 (I don't) but if I turn out to be right I'm hoping KFP5 redeems the mistakes people think 4 had and ends up being a solid movie