The World League of American Football is in big trouble Stateside. The NFL- backed spring league lost more than $5 million in its rookie season, has already replaced two commissioners, and had TV ratings in the U.S. that were half what the league had hoped they would be. Now, faced with having to ante up $600,000 to $700,000 to keep the league around for a second year, several NFL owners will gather in Dallas for a fate- of-the-WLAF meeting on Sept. 12, intent on withdrawing their support. ''It's a financial sinkhole, and we're throwing good money after bad,'' said one NFL team executive last week. Any good news? If there is, it's all abroad: Paris wants a franchise, as do Amsterdam and Bogota and Tel Aviv . . . and even Lithuania and Moscow. Imagine that Lithuania-Sacramento rivalry. WLAF fever. Catch it. Copyright 1991 Time Inc.