After San Antonio City Council shot down Mayor Gina Ortiz Jones’ proposed pause on negotiations for a new Spurs arena, the mayor unveiled yet another potential hurdle for the project: that the financing should be put to yet another public vote. After Thursday’s contentious meeting, Jones said she wants to get council backing to put the city’s funding for the arena on the May ballot so voters have have a direct say in whether they want the city kicking in $489 million of the cost of the $1.3 billion NBA facility. If scheduled, that vote would follow a November election in which Bexar County voters will decide whether to increase the visitor’s tax to 2% to help fund Project Marvel, the $4 billion sports-and-entertainment district that would contain the arena.