Bulgaria, Greece and Romania and Serbia are coming together to make a joint bid to host the 2030 World Cup.
The leaders of the four countries confirmed their intention to compete to host the tournament on Friday at a meeting in the Bulgarian Black Sea resort of Varna.
Competition to host the 2030 tournament has not opened yet, although this is already the third potential bid being hinted at.
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The Football Association is conducting a feasibility study about making a joint bid for 2030 with the three other home nations and the Republic of Ireland.
UK Sport stated last month that hosting the event would be the "crowning achievement" of a plan to host dozens of worldwide sporting events over the next 15 years.
South America's football leaders are already promoting a three-way centenary bid by Argentina, Paraguay and Uruguay, which was the original World Cup host in 1930.
And Morocco, five times unsuccessful in the bidding process, could team up with Algeria and Tunisia in a combined bid representing North Africa.
Bulgaria's Prime Minister Boyko Borissov said on Friday: "I think it is worth discussing the proposal of (Greek Prime Minister Alexis) Tsipras.
"Just as Bulgaria and Italy hosted the world volleyball championship (in September), the four countries - Serbia, Greece, Romania and Bulgaria - [can] bid to host the world's [football] championship in 2030."