Lennox Lewis to come out of Retirement?

Rumours that the 39 year-old is to return to challenge Vitali Klitschko have been circulating, and Klitschko is apparently 'happy to fight Lewis'. The last Lewis-Klitschko fight (in 2003) was declared a TKO on cuts. Afterwards the Briton/Canadian retired to Kitchener, Ontario. But now he aparently needs the money - he's being offered about $50m for the fight.