The projects will feature all five girls, including Victoria Beckham, although it is still early days.
That includes one-time Posh Spice Victoria Beckham, whose career has taken her nearly as far as humanly possible away from the confected 1990s pop act scene. The return will happen in 2018.
The uber-popular '90s girl group Spice Girls will reunite next year for a compilation album and TV special. To achieve the consent of Victoria was the most hard, this was all connected, - said the source.
A potential Spice Girls reunion with all five members is one of them. And as a person who still listens to the seminal albums Spice and Spice World, that is very good news.
"The fact she is on board now is down to how much closer the five of them have become recently".
As well as Mel's split from Stephen Belafonte, Geri Halliwell's newborn son, Monty, has been dubbed a "uniting force", with the source adding: "Things between them were quite icy at the start of the year".
Mel B, Victoria Beckham, Emma Bunton, Mel C and Geri Halliwell, have allegedly been taking part in secret talks regarding a potential reunion since the summer, with a 2018 date now agreed for a reunion.
It comes months after Victoria and Mel C were said to have stopped Mel B, Emma and Geri from getting together for a reunion concert as a trio.
Geri, said to be the driving force behind plans to reform, told Red magazine in October she had "given up trying" after recent stalled attempts. It got to the point where I just had to let it go.
Fans of the girl group have expressed their excitement on Twitter.