Marvel Entertainment Group reached an agreement yesterday with its creditors that promises to end months of bitter legal battles and allow the publisher of comic books to emerge from bankruptcy this fall. The deal called for two entities controlled by Carl C. Icahn, who won a legal battle last month to take control of the company, to buy the $610 million in secured claims that Marvel owes its banks. Marvel would pay its bank creditors $395 million in cash, proceeds from the sale of its subsidiaries Fleer and Panini and warrants to buy 10 percent of the reorganized company that would merge Marvel with Toy Biz Inc., a toy-making company that owns the right to manufacture toys based on Marvel characters. Shares of Marvel, which filed for Chapter 11 bankruptcy protection in December, rose 12.5 cents, to $2.375, while Toy Biz shares rose $1.3125, to $9.3125.