The theory of motivic superpolynomials is developed, including its extension to algebraic links, relations to $L$-functions of plane curve singularities, the justification of the motivic versions of Weak Riemann Hypothesis and DAHA recurrences for iterated torus links. The DAHA construction is provided. Applications are considered to affine Springer fibers and compactified Jacobians of type $A_n$ in the most general case (for arbitrary characteristic polynomials), rho-invariants of algebraic knots, motivic formulas for the DAHA-Jones polynomials, including the case of $A_1$. The key theme is the conjectural coincidence of motivic superpolynomials with the DAHA ones, which can be interpreted as a far-reaching generalization of the Shuffle Conjecture. The 2nd connection conjecture links the superpolynomials to the $L$-functions. DAHA theory is adjusted to the definition and main properties of superpolynomials. The motivic tools are systematically exposed, a certain unification of Schubert Calculus with the theory of plane curve singularities.