Still hoping that bankrupt mall owner General Growth Properties will have a change of heart, rival Simon Property Group has upped its takeover plan by $1.1 billion and added four financial backers to its proposal. General Growth, which balked at Simon’s $10 billion February buyout offer, has since backed a proposal by Brookfield Asset Management. The additional investment by Simon, which said last week it would match the terms of Brookfield’s proposal, comes on top of the $2.5 billion the company has already pledged, plus $1 billion from New York hedge fund Paulson & Co. ING Clarion Real Estate Securities, Taconic Capital Advisors, Oak Hill Advisors and Deutsche Bank AG’s RREEF unit will also join the plan. Critics have said a Simon takeover would raise antitrust issues. “Would Pepsi allow Coke to become its largest shareholder?” asked Cryus Madon, Brookfield’s senior managing partner. CEO David Simon is reportedly scheduled to meet with General Growth officials today in Chicago. [Bloomberg]