Dragon is showing an M1A3 with TROPHY anti-missile system, but there is no such tank. I am guessing they mean an M1A2 SEP v3, which is the latest version. No idea on when it is coming from Dragon (or anyone else) though.
The M1A2 SEP v3, has already begun fielding. 1CAV at Ft Hood, TX got them last year. 3ID at Ft Stewart, GA just started getting them this month. Here is a recent post on them.
Lee is right though, the next-gen M1A3 is still in the “what do we want” stage and nowhere near even putting out bids for prototypes. It is years and years off before we see anything on it.