Dish has always had the chance to bid on Sunday Ticket. It's not Charlie's style to pony up the massive $$ required, though.
And if he were to gain control of SiriusXM, I don't think he'd keep satellite radio around for too long...
I think if he did it would be one half of the bandwidth, with the other half going to mobile video. I think that's his big plans here, and to use the ground repeater network for that mobile video service. But if he's going to do that why not just dump the music part completely, or just make it another music choice, available on cable and satellite TV services and not much else.