Mega Evolutions could be another possible theme choice. With a grand total of 47 Megas (49 if you also count Primal Groudon and Primal Kyogre) there's a solid number to choose from, unlike the small number with the Baby Pokemon.
I'd happily take it whether the chosen theme is Pokemon-based or not. I know the Smash Bros theme from earlier in the year had Pokemon characters in it but it still had some variety. But as far as I know we've never done an entirely non-Pokemon theme yet.
I'd happily take it whether the chosen theme is Pokemon-based or not. I know the Smash Bros theme from earlier in the year had Pokemon characters in it but it still had some variety. But as far as I know we've never done an entirely non-Pokemon theme yet.