It's a pretty good guess that regardless of the cost of the DCS license, Atlas prices will be higher than MTH prices were, for many reasons, but we will see.
As far as TMCC showing up in these former MTH products, I wouldn't hold my breath. They are engineered to use DCS and redesigning for TMCC is additional capital investment that may or may not see a return.
You're probably right but for me the higher the prices go the more 3rd Rail locomotives become even more attractive.
While I agree with you that MTH products are engineered to use DCS I think it would be very easy to change a few things and install TMCC if they wanted to. If the users like us can do it I am sure Atlas could do it even more efficiently.