Aaron Cook's representatives have told the British Olympic Association they have new evidence they want to submit in their battle to have him selected for the taekwondo team.
The BOA are expecting to receive a formal letter from Cook's legal advisers and to discuss it at Wednesday's meeting of their national Olympic committee.
Cook was overlooked by GB Taekwondo for the under-80kg place on the London 2012 squad in favour of Lutalo Muhammad, also a European champion but who would need to drop down a weight for the Olympics.
At the third time of asking, the BOA ratified Muhammad's inclusion - a decision which left Cook furious, claiming he had been "cheated" out of his rightful place because of the decision to leave the GB Taekwondo Academy programme.
BOA chief executive Andy Hunt is adamant that GB Taekwondo's selection process was above board but confirmed that they may look at bringing in changes across all Olympic sports in the future.
Hunt said: "I have received an email from Aaron Cook's agent saying I will get a letter from his lawyers on Wednesday.
"It says they have new evidence they wish us to look at which may give rise to legal action.
"We have spent an unprecedented amount of time going through the detail of the selection process and made sure third time around the process was followed 100 per cent to our satisfaction and with an independent observer there.
"There was unanimous approval by our qualifications panel and it is not for us to judge if they have selected the right athlete, just to make sure the process was followed correctly."
The BOA do not have the power to approve sports' selection procedures but they can comment on them and recommend changes. Hunt said after London the BOA would look at following the lead of the USA and Australia and be much more involved in ratifying selection procedures.
"We need to have a thorough review to look at discretional selection policies and how we can improve that so there is more transparency for athletes," added Hunt.
"Australia made a radical change to selection policies after a large number of appeals before the Sydney Games and we need to look at best practice."