>>33613079A story mode in the style of the Soul Calibur games would be very cool IMHO. They share the same director even, he should know how to pull it off.
Better unlockables would be nice. Like lore/character tibits, general trivia, more playable character alt skins. And of course unlockable playable characters as well. The original Pokken only had the Mewtwos and you needed to play through the boring slog of the single player mode to get them (thankfully not in DX).
A better arcade mode, maybe even some minigames.
And, while this is probably a pipe dream, I'd like to see an art style overhaul. Drop the OC Ferrum region and the generic stages and use iconic locations from the main series the average Pokemon fan could easily identify (Dragon's Nest ---> Spear Pillar, Power/Speed Training Gym ---> any main series Gym, Blue Dome ---> the aquarium from BW2... the list goes on). Use the Sugimori artwork (or one of his copycats) for the boxart and the human characters. If games like PMD and even some P2W mobage like Duel can have them why not Pokken?
Overall I'd just like to see a Pokken game with some actual budget behind it. The mechanics are already solid IMHO and the character balance is fantastic, but pretty much everything else needs to be reworked from the ground up.