It's a known fact that the younger crop (of Malayalam film actors) still struggles to deliver solid masala flicks like in the 90s. This, of course, is enough reason for the two big Ms of Malayalam to continue to churn out lazily written, hazily executed trash like Shylock. Everything in the movie reeks of unoriginality. The treatment by Ajai Vasudev is stale (it was already evident in his previous two ventures), and there's basically nothing in Shylock worth recommending.
The ridiculously clichéd revenge plot, the superficial action set-pieces, the irritating background score, the self-referential and borrowed (from other blockbusters) humour, the abundance of sunglasses, an unnecessary item number, lack of solid supporting characters and/or antagonists - Shylock suffers from all of it. The nicest thing about it is probably the absence of a romance track for 68-year-old Mammootty.
Verdict: Don't bother!