The 41-year-old Brazilian, who has had to make do without a number of key players since taking over from Rafa Benitez in December, is confident his talented squad are capable of winning major trophies even though they recently relinquished their hold on the Serie A and Champions League titles.
"This team has achieved something huge this season," Leonardo told reporters. "We've been heavily penalised through a series of injuries but the team has shown great spirit. We struggled in the semi-final to overcome Roma but the final of the Coppa Italia will be a celebration.
"We don't need to bring in replacements (for next season). We just need to touch up a few areas to be competitive on all fronts but the nucleus of the team is already there and we won't interfere with that spirit."
The six-times Italian Cup champions lost centre-back Walter Samuel for virtually the whole season and fellow Argentine Diego Milito has struggled for fitness since scoring both goals in last season's Champions League Final win over Bayern Munich.
While holders Inter have one last chance to salvage their disappointing season, Palermo have been on a rollercoaster ride thanks to eccentric president Maurizio Zamparini's actions which led to a coaching merry-go-round.
"We know we are up against the world champions but if we can play at our full potential we can beat any team. The players really want to bring home the cup for our fans," Rossi told reporters.
"Right now it makes no sense whatsoever to mention the names of other coaches," said Rossi. "It's just a waste of energy. The president knows what I think. Whatever I have to say I, unlike him, tell it to his face."
Zamparini tried to clarify the situation by saying: "There's a 60 to 70 percent chance of Delio Rossi staying. It won't depend on the result but we'll make the decision after the final so it doesn't affect the players. We have a plan A and a plan B."
The final could be the last time Palermo's two forwards - captain Fabr
