Haven't gotten any confirmation on what the Monday Mystery Movie on April 3rd is yet, but all signs are pointing to Mafia Mamma.
It can't be Air since Regal Gallery Place Stadium 14 did an early screening of it today (not to mention it would make no sense to do it 2 days before release), they wouldn't do The Pope's Exorcist since it's a horror movie and they wouldn't do Renfield since that already has hype.