Ratified on Thursday, the competition will serve to replace the majority of international friendlies and offer places in UEFA's European competitions.
Divided into groups that will feature promotion and relegation, nations will also compete for the overall title after the governing body's 54 member nations voted in favour of the overhaul this week.
And Platini feels the removal of many friendlies from the footballing calendar will serve to boost the international game.
"The principle is accepted and we need to congratulate ourselves on that," he said.
"We have heard the call of those that want to do this so we have created a competition.
"It's going to replace the friendlies, they don't interest anybody. It's more of a competition and I think it's a good decision because nobody wants these friendlies."
While some details still need to be ironed out, one worry was raised in the press briefing on Thursday - the fear clubs may see players return more fatigued due to the competitive nature of the league.
However, Platini looked to assuage such concerns, assuring that such problems would be contemplated prior to its planned start date in 2018.
"We've just accepted a resolution for a competition that takes place in 2018. We're going to bear in mind all these considerations but let's come back to this years down the line and maybe I'll have that answer," he added.
"You're getting ahead of yourselves.
"We're not going to go into details right now. I can't foresee that today."
