Banpresto has released the first PV for SRW Z 2. It is most likely part of the CG intro and does not feature any gameplay footage.
The official site has also been updated with character listings, and although most are under construction, there are some attack slideshows for some series. (The site at this moment in time seems slow though.)
You can see the PV and some compiled shots after the jump.
Credit goes to Sanger on SRWG forums for finding/compiling these screens.