I think it depends on what they and the USFSA figure their chances of winning Ice Dance are. Either D/W and S/S should be eligible to go. D/W should be sent to compete for 1st place in Dance but if that is conceded, then there is no difference which team goes if D/W wishes to rest.
The most interesting about the teams will be whom they pick to send.
I don't know whether Meryl & Charlie will be skating the team championship. Charlie said in an interview, that it was sad to skate Der Fledermaus for the last time; did he forget, or are they not going?