I don’t follow super rugby so I’m not upto scratch on all the reasons why but it would still make much better than a team from the U.S. ?
Sunwolves didn't work primarily because there was no integration with the Top League competition and its clubs.
Development-wise, it was envisioned as bridging the step between club scene and international footy. So in theory, it should've been a pathway from Top League through to the test team and featuring the best Japanese players (with a sprinkling of imports). Commercially, SANZAAR saw it as a way to tap into the corporate honey pot of Top League club owners.
Neither vision eventuated. Top League clubs and its owners weren't interested and the Sunwolves were left to essentially operate in no mans land. Lesson there in expanding too early before putting in enough groundwork.
Unless they fix that first, there's little point trying again. But not that I think the US is any more feasible.