What Pokemon do you hope make it into Z-A?

I am eagerly awaiting a teaser and a release date and part of that anticipation has me speculating on the pokemon that will be in this game and which would make my potential team. Currently I have Sylveon as an almost guaranteed part of Z-A and a space on my team for her.

Side question; how do you decide your team build in each game? I typically do starter, 1 regional variant, 2 returning mons, and 2 new mons.

20 days to Pokemon day, let's hope we get some news!