The Dutch begin their World Cup qualification campaign against Turkey in early September and face Belgium in Brussels on Wednesday night as preparation for that encounter.
Oranje will be desperate to move on from a dreadful European Championship when they went out in the group stages after losing all three of their matches, having been tipped pre-tournament as one of the favourites.
"We are here again with a new goal. That's the World Cup in Brazil, since we want to qualify," Sneijder told OnsOranje.
"We must talk as soon as possible (about Euro 2012), which we have not done.
"But I think we are all mature people, I see no problem. It is also true, if you do not want it to be resolved, then it cannot be solved."
Louis van Gaal recently signed a two-year deal after Bert van Marwijk was sacked and could hand debuts to Bruno Martins Indi, Ricardo van Rhijn, Nick Viergever, Stefan de Vrij, Adam Maher and Bas Dost.
Everton defender Heitinga is in line to earn his 81st cap and is looking forward to taking on their neighbours.
He said: "It will still be a competition between two countries with great potential. It is a great opponent."
Belgium will be close to full strength, with just Everton midfielder Marouane Fellaini ruled out through injury.
Coach Marc Wilmots will be hopeful he can lead his side to qualification to a major tournament for the first time since 2002 and sees this friendly against the Dutch as the ideal preparation.
"I know the world only too well, players get injured or ill. I have several options in my head," he said.
"Every match is different. We must take into account the play of the opponent, scouting is very important."