I'm not saying this is impossible, but that's quite the leap here.
Also, for the uninformed, what does Virtua Fighter have to do with Street Fighter, if anything? What's up with these outfits?
Ryu in Smash 4
Tatsonoku(sp?) VS Capcom selling well on the Wii
Street Fighter IV selling extremely well on the 3DS
Both companies having teased/hinted about it over the years.
Nintendo's huge push to partner and license out of its characters to third-party developers this gen (Hyrule Warriors, Smash, Monster Hunter, Bayonetta, Pokken)
Additionally, with the exception of Snake and Megaman, every third party character added to the Smash roster has signified some type of partnership with said developers. (Sonic has since had a huge exclusive presence on Nintendo consoles, PacMan was included because the game was co-developed with Bamco) I feel like now, with both Megaman AND Ryu added to the roster, Capcom has to be developing/co-devolving an exclusive Nintendo title in return.