Earlybird tickets are already available for Lovebox, listing the park as its location.
While Field Day reportedly distributed leaflets citing the park as its new venue, however, Lambeth Council said full planning permission had not yet been given forany of theevents to be held on the site.
Lovebox and Citadel Founder Jools Butterfield told the Standard he was looking forward to a "new, ever more colourful chapter" at its "new home in beautiful Brockwell Park".
NME reported in November that Field Day had confirmed its move to the popular park, however, organisers told the Standard that no new venue had been confirmed
Despite no official confirmation, residents of Herne Hill and Tulse Hill, claimed to be "up in arms" after leaflets were reportedly distributed calling the 50 hectare park Field Day's "new home".
In August, 20,000 revellers at Sunfall Festival, which took place at Brockwell Park, were left frustrated after battling four-hour queues to enter.
In previous years some 35,000 people have attended Field Day and 40,000 tickets have been sold for Lovebox, sparking further concern for those living around the leafy haven.
Campaigner Alice Salisbury said: "The level of misinformation and lack of communication has really got people in the area up in arms.
"None of us are against Brockwell Park being used formusic. It's a great venue.
"But we want to make sure these things are being done properly and this planning debacle hasn't helped anything.
"Sunfall saw queues so long that many ticket holders just abandoned it. What's going to happen here?"
Councillor Sonia Winifred, Cabinet Member for Equalities and Culture at Lambeth Council, said: “There are two new major commercial events proposed for Brockwell Park in June and July. Several layers of rigorous scrutiny, including licensing, Safety Advisory Group, community engagement and planning permission, must be achieved before an event can proceed.
“Throughout that process, the views and concerns of residents are carefully considered. Events of this size go through careful consideration, and we will listen to the views of local people.
“If agreed these events will be carefully managed so any disruptions for locals will be minimised, apprenticeships will be offered, local businesses will be boosted and extra money will be received to help fund the Lambeth Country Show and pay for park improvements.
A spokesman for Lambeth Council’s events team said: “Lambeth Council events team are in discussions with the organisers of Field Day who have met with local residents and councillors.
“As with all proposed events, there are several layers of rigorous scrutiny that include licensing, Safety Advisory Group and planning permission before an event can proceed.