It has been stated that Dish wishes to shutdown the wing satellites. I have not seen any actual statements from Dish officials to that effect.
For Dish to shutdown 61.5, they need to migrate ALL their International channel customers (among other things, which are not discussed here) to a new satellite. If I remember correctly, it was the August Tech Chat where it was mentioned that future international channels will go to 121 (E*9 satellite).
So Dish is obviously hoping to entice customers to sign up for the SuperDish (121 version) to get the "new" international channels (and probably old as well) while trading in their 61.5 dish. Presumably, there will be some cost associated with this, and Dish will probably try to get customers to sign up for a 1 year minimum on some package combo to finance it.
Presumably, at some point, Dish will have convinced ALL the international subscribers to migrate (while "sharing" the cost) and will not have to fund swap outs for non-converted customers prior to shutting off 61.5.
What is not clear about all this is 1) the timeframe (although it is probably on the order of 12 to 24 months after 121 goes online for customers), and 2) how the SuperDish will work for customers of both International channels (121) and HD (or selected local channels) (105).
All the above is predicated on the statement that Dish really wants to stop use of 61.5 (and 148?) for home DBS service. I am not yet convinced that is the case, although others who actually talk to Echostar executives may know something I don't.....