Visa, the credit and debit card giant, will run an IPO as early as next years, reports the New York Times. And by all accounts, it promises to be much bigger and much more successful than the MasterCard IPO. The big winners will be the major shareholders - the large banks like J.P. Morgan and Wells Fargo right down to the small credit unions that also have a piece of the company. The payday for the major owners could run to hundreds of millions because Visa has a large and expanding share of the card market. It is also trying to cash in on new technologies such as “pay-by-cell-phone.” The big problem is that all those lawsuits are out there from merchants who claim that the big credit card guys used their market muscle to rig fees and overcharge. Wal-Mart won a $3 billion settlement after it sued over the card companies’ mistreatment. When the Arkansas-based retailer is a victim, who can say irony is dead?   The consensus is that the Visa deal will be much bigger than the MasterCard IPO. That’s mostly because, notes breaking views’ columnist Antony Currie, the market is no longer nervous about the credit card IPO. The big run up in MasterCard shares, promises a big deal for Visa.