While Phoenix isn't the sort of character I'd associate with TGA, with all the current supposed disconfirmations, I don't think it really matters for his chances whether our next character is revealed there or not, as I frankly find the idea of a Sony character to be pretty much impossible.
I'd also say moreso than Terry, my hopes for Phoenix stem from the state of RE and MH representation in Ultimate, as those were the likeliest to be next in line for a Capcom rep beforehand (and Sabi saying no to Dante for fighter 5 too). AA7 reveal could be potentially scary for an eventual spirit board if he hasn't been confirmed for Smash by then however.