This is basically a fake announcement. "A full announcement with pricing will be available soon with an estimated delivery of September 2021." Its quite obvious this was in the MTH pipeline and the timing just landed such that they'll come out with a change of the box color.
They havent announced anything. No price, no specific offering, nothing. So in that regard, I'll remain cautiously optimistic that this is really just to help MTH sell the steam engines that were simultaneously announced (by showing people that a matching set of cars is going to come too), and help get the "ATH" operation off the ground by getting some orders moving.
I think we all hoped that getting a factory out of this would get atlas back in the engine production business again. I think its been about 3 years since they've delivered a locomotive. Hopefully the "full announcement" is just the April news letter that should be coming in about 3 weeks and it includes a locomotive announcement as well.