Just some thoughts in line with these - one thing I noticed that is intriguing is that Believe in Love is capitalized in the text below the Believe In Love video, which is posted by the Coldplay Official account on YouTube as shown here (underlined by me):
"Our friends. This is the end of A Head Full Of Dreams Tour, back where it all began, Buenos Aires. Thankyou everybody all around the world, at home and abroad, for being the best part of our show. For being the music and for keeping your and our heads full of dreams. This was our first chapter. From now on we’ll only be full of surprises. We love you. We’re grateful for all of you, with all of our hearts. We exist for and because of you. Goodnight, good afternoon, good morning wherever you are in the world. God bless you all. Be kind to each other. We’re in this together. We’re one big band. Everything is possible, if you never give up. And if you Believe in Love."
I don't see any reason as to why this should be capitalized, other than for the fact that it might represent a future song or title for an album possibly? It definitely fits with the message the band has been helping to spread throughout the entire AHFOD tour, and it also seems to fit with a lot of the songs on Kaleidoscope.
The other thing is the background music the band is playing throughout Chris's entire speech sounds somewhat similar to the first 30 seconds of Hypnotised (EP Mix), which might be foreshadowing something new... If one were to somehow put those small bell-type sounds in with this background music the band is playing, I can see it as being those first 30 seconds from Hypnotised (EP Mix)... The more I listen, the more I can kind of hear those actual bell sounds in the actual video, unless its just all in my head...
I also think Believe in Love could actually fit as a theme for a type of new psychedelic album if they were to be planning one...
Anyway, sad to see AFHOD at the end of its era but happy that Coldplay still isn't done!!!! Can't wait for the new additions to their amazing music!!!