Given the history of animosity between MTH and Lionel (especially MTH towards Lionel), cooperation on such a project as this would seem unlikely. Lionel has released information on it's operating system (see below), but MTH has refused to do so with its operating system. MTH's DCS system will operate most functions of Lionel TMCC/Legacy trains, but Lionel's TMCC/Legacy control system cannot operate most functions of MTH DCS trains. That's why.
Each of these manufacturers has spent many millions of dollars developing their respective operating systems. One could understand why they wouldn't want to participate in developing a controller that would encourage consumers to purchase a competitor's trains. Nonetheless, Lionel generously made available information about its system.
MTH has refused to do so, and that attitude is probably not going to change anytime soon. Mike Wolfe had the opportunity years ago to unify control systems by adopting Lionel's existing TMCC system, but, unlike everyone else (Atlas O, Weaver, K-Line and 3rd Rail), he chose to do his own thing. The animosity he felt towards Lionel may have been an important factor in that decision. Since then, nothing has really changed, and MTH has firmly, and apparently irrevocably, determined to keep its system strictly proprietary. It's difficult to imagine how anything is going to change its attitude and move it to agree to cooperate with Lionel on anything.
All of the foregoing is, and has been for a long time, general knowledge among those who have been in O gauge for a number of years.
"Lionel Trains Releases Legacy Protocol to Bring Hobbyists Together
Manufacturer-Agnostic System Integrates Mobile Devices, Opens Access to Developers
Concord, NC – January 15, 2014 – Lionel LLC today announced it will make public its Legacy command protocol and open its WiFi-to-model-railroad interface in an effort to grow the hobby by allowing a single remote to control all manufacturers’ locomotives.
"Industry hobbyists have long pined for a universal remote to integrate and control model railroad layouts. Lionel is taking the first step towards realizing this goal via the user’s own smart device and Lionel’s WiFi adapter. Layout Control System (LCS) WiFi creates a common access point with a royalty-free protocol designed for model railroading. Any manufacturer can use LCS WiFi to support their unique locomotive command sets. Within this framework, hobbyists will be able to control different manufacturers’ locomotives seamlessly from one app running on a smart phone or tablet.
“To keep up with today’s mobile-centric landscape, unified control from a smart phone or tablet is critical in growing the hobby of model railroading,” says Jon Zahornacky, Chief Technology Officer at Lionel. “Publishing our WiFi protocol gives the hobby a royalty-free path to controlling any manufacturer’s model trains from smart devices using our WiFi adapter.”
"Lionel is working closely with LCS partners to develop their own apps that connect to Lionel’s WiFi interface. The first announced such product is Blue Train developed by Bob Krivacic, a long-time innovator in the model railroad industry. The BlueTrain app runs on Android devices, connects to LCS WiFi, runs Lionel locomotives and can be used simultaneously with any other LCS-compatible controller.
“By opening the Legacy protocol, Lionel is allowing other manufacturers’ products to control Lionel Trains. It’d be great to see other manufacturers follow suit and begin sharing their own proprietary protocols. Everyone involved in the model railroad world stands to benefit,” says Bob Krivacic, industry innovator and developer."