Rumours that Street Fighter’s Ryu and Fire Emblem’s Roy would be in Super Smash Bros started back in April when reddit user shinyquagsire23 found sound files including Ryu's Street Fighter theme in the latest update pointing towards these characters.
These rumours now appear to have been confirmed. Two leaked videos show both characters in action. Links to these videos are below.
This seems to have have come about due to the unexpected early release of the 1.0.8 update in Japan. Alongside these sound assets there have been other new items found including a Splatoon themed trophy and new stages such as Dreamland 64
Nintendo are due to have a livestream event on Sunday outlining some of their future plans for Super Smash Bros. So hopefully Ryu and Roy will be officially announced then.
With 51 characters already in the Roster, it is great that more are being added, particularly such big name characters too!