Lord knows, there are enough summer competitions here and there. Is the problem getting the sponsoring clubs/federations/etc to agree on one site?
What are the bars to getting one?
I'd particularly like to see an ISU sanctioned summer competitions here in dance and pairs. It is not necessary for an event to have more than one discipline represented. NRW Dance is sanctioned.
New Senior teams need to get a qualifying score these days to compete at either 4CC's, Europeans, and/or Worlds (ISU Comm 1640).
But more importantly, every year the rule changes in dance seem to be extensive enough that its become necessary to get ISU judges' input prior to the Grand Prix. That became clear in the surprises in the way the Golden Waltz segments were judged this year. Whatever CD is chosen for the Pattern Dance part of the SD next year, there will be similar issues.
It's twice as expensive (obviously) for pairs & dancers to make it to Europe to attend a Senior B than for singles.
It's not like there aren't enough teams from enough countries who train in North America to make the event international, particularly in dance. A quick skim of the ISU biographies yields this list of teams who train in NA, at least part of the time:
O'Brien and Merriman train in Vancouver for the "high season"
Feigin and Krasniak, at Arctic Edge
Good & Sorensen train part time in the USA (Cromwell with Matthew Gates)
Allison Reed and Otar Japaridze (Mount Laurel with Platov)
Kerrs train in Princeton, NJ, with Platov
Coomes & Buckland train in NJ with Platov
Faiella & Scali at Aston with Linichuk
Pajardi & Caruso at Lake Placid (if they are still together)
Reed & Reed (back in Hackensack with Galit Chait)
Tobias and Stagniunas) ) Canton with Shpilband
Aronow and Pirogov (not sure if they are still together) Canton with Shpilband
Bruhns & Lavrik trained at Crowell with Matthew Gates
Khokhlova & Andreev at Canton, MI, with Shpilband
Pushkash & Guerreiro at Astin, PA, with Linichuk
Krail & Peter at Astin with Linichuk
Heekin-Canedy & Shakalov train at Stamford in USA with Dubova