The key item that stuck out was:
On these two Satellites they will be relaunching Dish Network in FULL MPEG4. All current Dish Network Channels will be available in full MPEG4. And everything will be receivable with just one 18 inch dish.
This is pretty much saying that the satellite(s) have to be on the Ku-DBS band since a larger dish would be required on a Ku-FSS or the KA band.
Just speculation based on the above would suggest that a new slot would be used and 2 satellites launched to it.
E11 is supposed to be a spot beam satellite with steerable slots. Steerable spots would allow it to go to a variety of locations and still be able to aim the spots at the right cities.
There has been notes of SES building a Ku-DBS satellite for Dish with a TBA slot (mentions in Dish's SEC filings).
So, if the SES satellite is CONUS Ku-DBS and E11 is a spot beam satellite that can go in a variety of slots, it is possible they are going to a new slot. Either a foreign slot (like 129 is Canada and 77 is Mexico). Or perhaps a new slot that the FCC is going to open up (although you would think there would be more public announcements out of the FCC about this).
With CONUS from SES, spots from E11, 8PSK and MPEG-4 they could have a single satellite location with 2x+ the capacity of a old technology slot.
When they say 1000 standard definition channels, I believe they are counting the channels on spot beams.
I also wonder about national HD content, if that would require a second satellite location. To serve 200 cities with SD locals and 100 cities with HD locals, that would take a lot of spot beams. This means that they would probably have to have a bunch of transponders used for spot beams to cover all this. One would almost have to have 10-15 TPs just for locals. This would leave 17-22 TPs for CONUS. 17TPs * 25channels/TP is 425 channels of standard definition CONUS not allowing for any CONUS HD.
This is of course all speculation. Other alternatives could be a combination of KU-DBS and Ku-AUX which Dish has licences for too, perhaps they could come up with a slot that uses 32 Ku-DBS and 16 Ku-Aux TPs, for a small dish to work they would have to have 4 degrees of separation from adjacent slots... This would let them do something like 16 TPs for spots, 16 TPs for 400 standard def CONUS and 16 TPs for HD (64-96 CONUS HD channels).