When Farmington becomes a part of Canada, call me.
That waterpark in Canada would still be there if Buffalo never existed. It exists because of tourism to the Niagara Falls/Ontario, Canada region which has little to do with Buffalo.
The waterpark proposed in Farmington (which was originally proposed for Henrietta, but moved probably due to issue of Monroe County government and the realization a more central Finger Lakes/Rochester/Syracuse would be better) is more about the regional market of the Finger Lakes as a hole, and would likely be moved closer to Syracuse if Rochester did not exist.
Doesn't much matter in the end though, because neither Buffalo or Rochester can likely support this type of venture for long and would doubtfully ever see the idea come to fruition.