The England boss says he could yet make a Theo Walcott-style surprise announcement when it comes to his squad selection.
Walcott was named in Sven-Goran Eriksson's 23-man party for the 2006 tournament despite not having played a first-team game for Arsenal.
His decision was largely condemned when the young striker did not feature in the tournament before England crashed out on penalties in the quarter-finals.
Not ruling out a similar decision, Capello says he may well follow in Eriksson's footsteps in naming a squad member who has never before played in the senior squad.
"Yes, it is possible," he said.
Youth"It would have to be a young player because I know the older ones better," he added.
"We have four good young players already: James Milner, Aaron Lennon, Gabriel Agbonlahor and Theo Walcott. They can all improve even more this season."
Capello admitted that the likes of Arsenal's Kieran Gibbs "has to play" to make his line-up but did not rule out Everton's Jack Rodwell when prompted.
The England boss, though, admitted that he has 16 of his 35 names "more-or-less" already decided.
"I have to repeat the same thing every time, though," he added. "The door is open for all the players.
"We have to wait until April to see what the situation is with the players."
Capello will have little time with his squad in the build-up to next year's tournament - after the friendly with Brazil, the Italian will only have his squad together for three days, ahead of a friendly on March 3, until the middle of May.
Regardless, England's superb qualification process stands them in good stead, having scored 33 goals in their nine wins from 10 games.
Asked if things could have gone any better, he said: "No. Just perhaps if we played 11 versus 11 in the Ukraine."