From the Tatsunoko side we have: Warning: Spoilers inside! Yatterman No. 2 from Yatterman (she’s on the left) Joe Asakura from Gatchaman From the Capcom side we have: Warning: Spoilers inside! Frank West from Dead Rising Zero from MegaMan Zero The last clue is an ambiguous file called “oncharactor_btn_zero.jpg”. It could mean Zero in his Mega Man Zero look or classic Zero from Mega Man X. There’s something left Capcom to announce after all! News Source: Siliconera So I was wrong, there were 2 from Tatsunoko and 3 from Capcom. But who is this mysterious final character? It's most likely looking like another MegaMan character though.