Fanon Season 4 will be filled with a bunch of crossovers.
- 2nd Lab Rats Crossover
- Miraculous Ladybug Crossover
- Thundermans Crossover (the first trans-channel crossover)
All that is known is that the Thundermans will visit Mighty Med as the T Force. The cast has been confirmed.
- Kaz - Bradley Steven Perry
- Skylar - Paris Berlec
- Oliver - Jake Short
- Gus - Augie Isaac
- Alan - Devan Leos
- Thunder Twins - Kira Kosarin and Jack Griffo
- Laser Girl - Addison Riecke
- Rapid Gentleman - Diego Velazquez
- Thunderman - Chris Tallman
- Electress - Rosa Blasi