Let me guess, VF-0D is the front runner as it would require the least new tooling, fallowed by the unnamed valk which I bet is a VF-17. The VF-17 would be more expensive to develop, but can capitalize on the success of Frontier by virtue of being similar to the VF-171. additionally the VF-17 features predominantly in Mac7 which is like it or not the largest chunk of Macross cannon.
In other words the VF-4 is getting shafted do to lack of screen time... how disappointing.
:edits:
yes you are, the Metal siren is the worst looking valk ever, and the VA-3 is bitchin' and should not be disrespected.
no, please no, just no... can we have something that isn't tiny AND looks like crap PLEASE!?!?