The band want to complete a three-week jaunt of the UK, ending with a huge show at Wembley Stadium featuring some of the biggest female artists as support acts, according to the Daily Star Sunday.
Cheryl Cole, Nicola Roberts, Sarah Harding, Kimberley Walsh and Nadine Coyle are also looking at other possibilities including an ITV2 behind-the-scenes documentary, an ITV1 Audience With... show and a new greatest hits album featuring fresh tracks.
The news comes after the band's manager Hilary Shaw announced in April that all five girls will perform together next year.
"The early talk is a short three-week tour towards the end of the year, finishing at Wembley," a source said.
"The Wembley Stadium idea is to get a few of the hottest girlbands and female performers like Leona Lewis, The Saturdays and Alexandra Burke on board and bill it as Ladies' Night, with them headlining.
"It would be a good way for the band to pretty much say goodbye - maybe forever. If it doesn't come off fans will definitely get the chance to see all five singing together again."
Previous reports have indicated that Girls Aloud will record new material in January, while Cole, Walsh and Roberts have all expressed an interest in marking the band's tenth year in the industry.
It has also been reported that they are being lined up to perform at the opening ceremony of the 2012 London Olympics.
Watch Girls Aloud performing 'The Promise' live on The X Factor below: