I think the reason they didn't put team E is because team E is the only one that didn't held performances outside SKE theater, and their koen is B3 revival, so I think it is also because they don't have original koen (songs) yet...
You're right, but still...
- They could have easily used some Team E footage from any SKE48 concert. I doubt anyone would care where it was recorded.
- B3 may still be tricky copyright-wise, because we still haven't gotten a studio B3 album release... but they could (should?) have included a Team E performance, somehow.
Aw well, I'm a Team S fanboy and I "Koi wo kataru shijin ni narenakute" is one of my favorite stage songs, so I'm definitely not complaining
Actually, thinking about it now, Wimbledon may also not be the most representative song either. I wonder which version they took... I hope the Yuria/Akari one. A better (/more fair) option would have been to stick with a group song imo.