Glamorgan chairman Paul Russell has described the plan to stage an English rival to the Indian Premier League as a "bootleg proposal".
Russell also described the idea as a "flight of fantasy".
His comments came despite the fact the Swalec Stadium would be in line to host one of the teams.
Russell would rather see improvements to the existing structure including the right to field more overseas players.
The new proposals, are expected to be put to the England and Wales Cricket Board next week, would see the county structure replaced by nine franchises based on Test match grounds.
606: DEBATE
The event is scheduled to take place in June and July from 2010.
The new 25-day, 57-match tournament, which has been proposed by the Marylebone Cricket Club (MCC), Lancashire, Hampshire and Surrey, provoked scepticism by Russell.
He said: "I believe this is wrong. You must remember this is a bootleg proposal which has been generated from self-interest.
"It is divisive for the game of cricket in England and Wales and it assumes, we say quite wrongly, that there is an appetite for city-based franchise cricket in the UK."
And despite the Swalec Stadium being in line for such a franchise Russell is adamant it is not the way forward.
"This is not a gravy train, this is a little toy train that a couple of people have been playing around with for some time.
" I don't think these forays into flights of fantasy and fairytale economics do anybody any good - least of all Glamorgan," he continued.
The new proposals include plans to rival the IPL by using a bidding process to attract the biggest starts of the international stage.
It also suggests each squad consists of 12 home-grown players, with a salary cap of £1.5m.
An ECB spokesman said: "We don't know anything about it. Nothing has been presented to the board yet and it's not on the agenda for our next board meeting."
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