If they don't merge I would say that network sharing is the next best thing. Hell they might just include Dish in it.

ummm isn't that advertising without admin consent? a BAN is in order, ...  Oh wait.... 😁 ok back to topic.     Navigator Concept.

I get 128kbps - 512kbps on "Extended Network LTE" and I'm 99% sure it's on AT&T's network. I get about 5mbps/5mbps on "Extended LTE" and I'm not sure if it's Verizon or T-Mobile's network... Neither of which seem to go towards my 300mb data roaming limit. The only thing that seems to go towards that limit is "Extended 3G" which is on Verizon. 

https://wmata.com/about/news/Wireless-service-now-available-in-all-Green-line-tunnels.cfm#main-content   Progress!

Lincoln Navigator