Are you asking if she's available? Or what her role is? Because I was thinking about this the other day. What if there are still documents that link Dany to Kings Landing to say she technically owns them, and the Lannisters are looking for them to destroy them and Dany is looking for them to take back the Casino and Vegas, and it's the main subplot for the RP, but meanwhile there are all of these other plots going on over it, so it wouldn't be in the limelight all the time?

Thats just a suggestion, if you don't like it or if you have a better idea, please share :D