Leyton Orient chairman Barry Hearn says the announcement that West Ham are to be anchor tenants at the Olympic Stadium may prove premature, reports SkySports.
Hearn wants League One Orient to be able to share the ground with West Ham and believes the decision made by the London Legacy Development Corporation (LLDC) breaches their own rules.
Hearn has launched a judicial review of the LLDC's decision and remains hopeful that he will be successful.
"We have applied to the High Court for a judicial review regarding the Olympic Stadium," said Hearn. "And we think today's announcement is jumping the gun.
"The decision of the High Court will concern whether the bidding process rules were followed by LLDC.
"We say they weren't, and that we weren't given the opportunity to enter into the 'teaming' (ground share) discussions that the bid process allows.
"We think this is a fundamental flaw in the bidding process and we're applying to the High Court for a ruling to sling the whole lot out. They may have jumped the gun."
Hearn believes Orient, whose Brisbane Road ground is less than three miles from the Olympic Stadium, will have to move if they are not able to share with West Ham.