Space Thriller ‘Slingshot’, Little League Drama ‘You Gotta Believe’, Docs ‘Merchant Ivory’, ‘Finding Mavis Beacon’ Topline Indie Weekend – Specialty Preview

'Slingshot' and 'You Gotta Believe' are top-lining the Labor Day weekend indie film lineup with documentaries 'Merchant Ivory' and 'Seeking Mavis Beacon'.