I think they can make Ash more serious a bit.
There are so many theories out there and I really hope they make a hidden dark theme rather than something so horrendously joyful.
I mean just look at Oak pretending to be Eevee, Buizel, Xerneas... How is that seriously gonna get the audience laughing.
And the scene when Ash stepped on Litten's tail, I was like poor Litten.
How did someone from the 2nd of Kalos League drop to such standard.
Fingers crossed, hopefully there will be something like a 2nd season(like how there is a XY and a XY&Z anime) for the Sun and Moon anime where everything will be dark themed with Ultra Beasts and Aether Foundation vs Team Skull.