I've heard rumblings of another IP potentially included in the parade lineup. Just a rumor at this point so it could be completely wrong. No clue on if it will be a full float or just a character.
The IP would be another 3rd Party/non-ComcastNBC, and not Sony again either. I personally think it'd be kinda funny if the character passed by Hollywood during the parade route. Definitely fits the retro vibe the parade seems to be taking on.