The forward has made 79 appearances for the Magpies and scored 30 goals in four seasons.
The 29-year-old was released by the Magpies in December 2007 following a series of lengthy injuries.
Magpies chairman John Armstrong-Holmes has said the takeover could be completed "in a few weeks".
Ian McParland has been kept on as manager of the Magpies under the new regime.
Despite some eye-catching performances on the left-wing for the Magpies, Laurent did not figure against Scotland.
The Magpies are guaranteed at least a top-two finish after Nottingham Forest drew 0-0 with Cardiff.
Solano is in his second spell with the Magpies after a stint with Aston Villa.
His departure marks the latest twist in what has been a tumultuous season for the Magpies.
However, Magpies boss Joe Kinnear has claimed he knows nothing about any interest in N'Zogbia.
Carroll, 21, scored 19 goals in 42 games as the Magpies won the Championship title last season.
When he was the manager of the Magpies he helped to "sell" the bondholder scheme to supporters.
The announcement was not surprising as the Magpies attempt to slash their wage bill following their relegation.
Wayne Routledge completed the Magpies scoring with a low strike before Brett Ormerod smashed home a consolation.
Magpies chairman Ray Trew said he would begin the search for a replacement "with a heavy heart".
The Magpies' latest defeat came at the weekend as they were beaten 1-0 at home by Tranmere Rovers.
Campbell, 36, has been training and playing for the reserves and is taking his full Magpies bow seriously.
Owen made 79 appearances for the Magpies and scored 30 goals in four seasons at St James' Park.
Pilkington broke his fibula during training on Friday, forcing the Magpies to sign Stoke's Russell Hoult on loan.
BBC: SPORT | Football | My Club | Notts County | Notts keeper out for two months
The Samoa international, who can play at either half-back or full-back, joined Sheffield from Brisbane club Souths Logan Magpies.
The Magpies led 2-0 with 10 minutes left, but goals from Gary Frewen and Fraser Franks levelled the match.
The 23-year-old has been linked with a move away from St James' Park following the Magpies relegation last season.
Keegan, 57, quit after eight months in his second spell as Magpies boss.
And it wants to see the Magpies established in the second tier of English football in four to five years.
"He's got a good eye for goal and has got bags of Premier League experience, " said Magpies boss Joe Kinnear.
Cotterill, who joined the Magpies in February, said the decision to go was "one of the hardest of my career".
N'Zogbia joined Newcastle in 2004, with the Magpies paying a nominal sum to Le Havre for their youth team player.
It is also believed that Ashley will move to appoint David O'Leary as manager if he remains at the Magpies.
The 24-year-old becomes Magpies manager Alan Pardew's second signing of the transfer window after Hatem Ben Arfa completed a permanent move.
BBC: Newcastle sign Stephen Ireland on loan from Aston Villa
The Frenchman ran into the box and struck a deflected shot which eluded Sorensen, to give the Magpies a great start.
Having replaced Gordon McKeag in the boardroom, he appointed former Magpies player Kevin Keegan as manager, and sparked the club's resurgence.
BBC: SPORT | Football | My Club | Newcastle United | Magpies confirm buy-out approach
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