Here is a pre-made save file folder that is to be placed into C:\Users\USERNAME\AppData\Roaming\Disney Interactive\Disney Infinity 2.0\XXXXXXXXXX\SavedGame\user0

Copying the entire folder and its contents into "user0" will overwrite your existing data, so be sure to make a copy if you wish to not lose any present data.

This Save file should have no toybox saves or playset saves but will have every Marvel Figure leveled up to 20 (max), and the current meta for optimal skill tree upgrades for Iron Man, Rocket Racoon, Spider-Man, Venom and Nova have been applied. Additionally, this save includes an infinitely large number of sparks, so you can respend and upgrade anyone as you wish

Happy Running :)