Disney Infinity 4.0 (My Idea)

This is just a speculation, not 100% true, but it's just a guess.

Disney/Pixar

 * 1) Wall-E (Wall-E)
 * 2) Simba (Lion King)
 * 3) Aladar (Dinosaur)
 * 4) Carnotaur (Dinosaur)
 * 5) Remy (Ratatouille)
 * 6) Carl (UP)
 * 7) Russell (UP)
 * 8) Dug (UP)
 * 9) Merlin (Sword In The Stone)
 * 10) Authur (Sword In The Stone)
 * 11) Madam Mim (Sword In The Sowed)
 * 12) Bolt (Bolt)
 * 13) Penny (Bolt)
 * 14) Mittens (Bolt)
 * 15) Rhino (Bolt)

Marvel

 * 1) Iron Spider (Ultimate Spiderman)
 * 2) Agent Venom (Ultimate Spiderman)
 * 3) Agent Rhino (Ultimate Spiderman)
 * 4) Doc Ock (Ultimate Spiderman)
 * 5) Hulk (Agents Of S.M.A.S.H.)
 * 6) She Hulk (Agents Of S.M.A.S.H.)
 * 7) Skaar (Agents Of S.M.A.S.H.)
 * 8) A-Bomb (Agents Of S.M.A.S.H.)
 * 9) Red Hulk (Agents Of S.M.A.S.H.)
 * 10) Ant-Man (Avengers)
 * 11) Thanos (Avengers)
 * 12) Yellow Jacket (Ant-Man)
 * 13) Scarlet Witch (Avengers)
 * 14) Quick Silver (Avengers)
 * 15) Vison (Avengers)

Kingdom Hearts (New Series For Disney Infinity)

 * 1) Sora
 * 2) Kari
 * 3) Ventus
 * 4) Roxas
 * 5) Aqua
 * 6) Riku

Megaman Battle Network (Main New Series For Disney Infinity)
I know this is NOT made by Disney, it's by Capcom, but....
 * 1) Megaman.EXE
 * 2) Lan Hikari
 * 3) Roll.EXE
 * 4) Mayl Sakurai
 * 5) Protoman.EXE
 * 6) Eugene Chaud
 * 7) Bass.EXE
 * 8) Searchman.EXE
 * 9) Raika
 * 10) Tomahawkman.EXE
 * 11) Dingo
 * 12) Gyroman.EXE
 * 13) Glyde.EXE
 * 14) Shadowman.EXE
 * 15) Napalmman.EXE
 * 16) Gutsman.EXE
 * 17) Magnetman.EXE
 * 18) Serenade.EXE
 * 19) Ring.EXE
 * 20) Slur.EXE
 * 21) Meddy.EXE
 * 22) Iris.EXE
 * 23) Burnerman.EXE
 * 24) Plantman.EXE
 * 25) Quickman.EXE
 * 26) Elecman.EXE