Did a quick search and didn't find the actual quote, this is
the closest one and the related quote of them saying it was from around that time, it was in one of the interviews of when they announced the game and its exclusivity:
"We know that Capcom, as a whole, isn’t the most financially sound of game developers. Though it’s doing a little better now, last year
, Capcom had just $150 million as a cash reserve
– which meant making any potentially risky games a potentially crippling prospect. In fact, Capcom’s terribly overworked Street Fighter producer Yoshinoro Ono said at the time that the reason there were no plans for a port of Ultra Street Fighter IV – and by inference, Street Fighter V – on the PS4 or Xbox One was a lack of resources – both human and financial.
With Sony paying, in part, for the game to be made, its exclusivity makes sense. At the PlayStation Experience, Capcom also announced that a port of Ultra Street Fighter IV would be coming to the PS4
. Also exclusive, it’s actually being ported by Sony’s Third Party Production Group."
There is at least a couple of other intreviews where I remember that Ono said that without Sony's money they would have had to delay the SFV develoment a couple years because they didn't have money to make it and that other titles had more priority for Capcom.
But in any case, if they couldn't afford to make a USFIV port imagine the whole SFV.
On a separate note, a fun fact: I just found that in this interview
from 2016 they say SFV was planned to be supported during 6 or 7 years (next year, the last SFV Capcom Cup will be the 7th), as they did with SFIV series.