I want Red to return as I love the character. Three iconic Pokemon and the team mechanics just work so well for me. Took a lot of practice to get my team up to speed. I love seeing those three in the game. They should return. They should also make two additional characters just to change up the look with an option for you to use your own Mii (if those return or not). What they can do for making some things more simple is to have a Pokemon sub game in it similar to Subspace Emissary, but your objective is to capture Pokemon for making your own team. You can pass up Pokemon and keep seeking for those you want. As much as I love Red's starters in Smash Brawl, I would like to see Totodile and a few others.
I just watched these videos tonight where some hacking textures were done and Totodile was made using Squirtle. Another instance using Squirtle, they put in Blastoise to face Charizard. I know Blastoise would be a welcome playable in Smash 4. Well here are those videos. My idea of having a custom Pokemon team can make things very interesting for fighting against other PT players and the other game characters. Especially those that I came to hate fighting, but loved getting some payback on like Zelda, Zero Suit Samus, Luigi and Ike.
team of Squirtle, Ivysaur and Charizard (Pokemon Trainer) vs Gary with his team of Blastoise, Nidoran and Garchomp
Link:
http://www.youtube.com/watch?v=sON4cV-d3ik
team of squirtle, ivysaur and charizard(pokemon trainer) vs Ethan with his team of team of totodile, bayleef and typhlosion
Link:
http://www.youtube.com/watch?v=vYAkM6WqEss
For Smash 4, I believe they need to enhance the attacks and recoveries for Red's team to help build the effectiveness of the team. We all saw some new, good moves in the Brawl + or - games. Like for instance the helicopter like movement given to Ivysaur using the forward tilt. It moved pretty far from what I remember watching on a youtube video, and was done even in the mid air as a useful help for recovering. I don't have a modded Wii and never had, but have seen videos of various texture hacks and so forth on youtube, like many others.