Jack Warner is consulting lawyers over the legality of his suspension by Fifa and has warned president Sepp Blatter 'must be stopped'.
Fifa vice-president Warner and Asian confederation president Mohamed Bin Hammam were suspended by Fifa's ethics committee pending the outcome of a full inquiry into allegations they paid officials 40,000 dollars each in bribes.
Bin Hammam has also withdrawn from the Fifa presidential election, meaning Blatter will stand unopposed on Wednesday to continue his reign at the head of world football's governing body.
Blatter, who was cleared by the ethics committee, has announced he will hold a press conference at 5pm on Monday when he is expected to respond to further counter-claims from Warner.
The Concacaf president insists he was not given a fair hearing and that the ethics committee had already made their decision before his hearing and resulting suspension.
Warner told Sky Sports News: "I must say that I look on the suspension as the worst form of justice by any sporting organisation.
"They came there pre-meditated, whatever you said they weren't prepared to listen. They were hand-picked to do a task and they did just that.
"I said before, Fifa will feel a tsunami coming. Trust me, you haven't seen it yet.
"At the end of the day, Blatter has to be stopped."
Meanwhile, Sports Minister Hugh Robertson has called on Fifa to be more "transparent and accountable" - but ruled out the idea of the Football Association quitting world football's governing body.
He said: "It's tempting at times like this but is it a viable option?
"There is no point in doing this type of thing if you do it on your own. We would win our own World Cup but, beyond that, there would not be very much achieved."
Robertson believes Fifa must act and cited the International Olympic Committee (IOC) as an example of how a major sporting body can be reformed.
He added: "The great example is the IOC. I was listening to Dick Pound this morning, he was one of the people that drove the reform of the IOC, they did that from within.
"He led a group which got hold of the IOC after the Salt Lake City scandal and said this should never happen again and that should be the way forward for Fifa.
"There have been many institutions - inside sport, politics and business - that have suffered catastrophic attacks on their judgement and credibility but they have recovered from them afterwards.
"But they have recovered by firstly admitting they have a real problem and Fifa are only halfway there.
"Secondly, they need to make themselves fully transparent and accountable so that people can once again have confidence in the way they lead world football."