UEFA president Michel Platini has revealed Euro 2020 could be held in "12 or 13 cities" across the continent.
Platini said a decision on the radical idea of a tournament "all over Europe" would be made in December or January, and it is believed UEFA executives back the propsal.
Turkey had been seen as favourites to host the 2020 tournament, but their bid has hit difficulties because the Olympics could yet be held in Istanbul in the same year.
Platini said the proposal of scattering the 2020 tournament throughout Europe was "an idea we are considering". "The Euros in 2020 could be held all over Europe," he said. "It could be either one country and 12 stadiums or one stadium in 12 or 13 cities. This idea will be discussed very seriously.
"We will have a great debate about 2020 and discuss the pros and cons, then we will make a decision. I think it is a great idea.
"We are not going to wait until we know whether Turkey are going to get the Olympics. It creates a problem for us. We do have other candidates. Everyone has the possibility to host it.
"It is easier to go from London to Paris or Berlin than Cardiff to Gdansk. It would be four games per venue. It is a great debate."
Denmark legend and Euro '92 winner Peter Schmeichel was among those to give his early backing to the idea on Twitter.
"Needs to be organised so fans don't have to travel to much, but the general idea is appealing to me," Schmeichel said."
For argument sake, a group could be played in Brussels Paris and London, traveling would be less than #EUR02012. For it to work UEFA must make fans needs no 1 priority, if not it will never work."
Platini also reiterated his opposition to goal-line technology, saying: "Where do we stop? There was a mistake in the Ukraine-England game [when Ukraine were not awarded a goal despite the ball crossing the line]. But there was an offside before that."
Meanwhile, UEFA general secretary Gianni Infantino backed the system of having additional match officials behind the goals, saying there was "full support" for it to continue.
"The experiment has been extremely positive. In over a thousand matches, there has been one mistake [the Ukraine decision].''
Infantino announced that the Millennium Stadium in Cardiff would host the UEFA Super Cup in August 2014, with Tblisi, in Georgia, hosting in 2015.