TMCC's been controlling DC motors for years. All my Lionel/Flyer TMCC locomotives have DC motors in them. A TMCC conversion is all you'll need.
All AM has is Forward-Neutral-Reverse electronic reverse units that automatically start up in forward. In the "trailing" locomotive, the wiring to the motor is reversed so they will run back-to-back.
They will cycle with a short power interruption like Flyer. Unlike flyer, after a few seconds of being powered off, they will again default to forward. They tend to remain in sync pretty well.
Rusty