By the time the title credit goes up in digital flames after being struck by a flying arrow, it should be clear to viewers that “Mirzya” is no subtle exercise in style. A broad, brash Bollywood romance, juggling Punjab folklore with more contemporary Shakespearean allusions in its two-tiered narrative, Rakeysh Omprakash Mehra’s film is so busy in all respects — from its structure to its song score to its poster-paint palette — that one barely has time to make sense of it all. Beneath its absorbing wealth of visual and sonic information, however, an essentially simple tale of love across the class divide grows too diffuse and distracted to stir the heart, while its two parallel stories — separated by centuries, as well as a tonal and aesthetic disparity — never coalesce into a satisfactory mythic dialogue. Despite international festival berths in London and Chicago, potential for a “Devdas”-style crossover is minimal.