***The story behind the popular Christian band*** Released in 2018, “I Can Only Imagine” is a biopic of Bart Millard (J. Michael Finley) of MercyMe, spanning his childhood, the abuse of his father (Dennis Quaid), meeting his true love (Madeline Carroll), starting the band, low-rent touring, acquiring a manager (Trace Adkins) and eventual success with the band’s titular hit. While this semi-modest inspirational flick is nowhere near as good as “Coal Miner’s Daughter” (1980) or even “La Bamba” (1987), it’s almost on par with the Johnny Cash biopic “Walk the Line” (2005), although it cost...