The Las Vegas group - who are currently recording their fourth studio album - had a break during which three members pursued different side-projects.
Bass player Mark Stoermer told NME: ''We started doing it in pieces last May, but it's taken time to figure out what it means to be in a band again, because we took so much time off.
''It might be out before summer, but there's no guarantees.''
Stoermer revealed that they have been in the studio with Steve Lillywhite, who has worked with U2, Damian Taylor, who has collaborated with The Prodigy, and Brendan O'Brien, who produced Brandon Flowers's Flamingo.
He continued: ''It's the first time we haven't worked with one producer from the beginning, and we bounced around a bit.
"It's more rock, but we're trying something we haven't done before. It'll still sound like us.''
> The Killers: 'We won't make some drastic change on new album'
Watch The Killers perform 'Spaceman' at the Royal Albert Hall below: