Ok, keeping comparisons aside and my own worries about shakti not being the right face for J..because he doesnt have the childlike innocence..as Appy said..
why I think it can work..Shakti has done a really good job playing father to teens in MP too! and trust me guys, if you'll saw the terrific phase where Uday Singh and Shakti (not the actor, 😆 his other son in MP) had so much friction in their relationship..ie shakti thinking his father is biaised towards his step bro pratap..and Uday singh sends him to gallows and orders a death sentence, before he releases him and throws him out of his kingdom..it was so powerful!
something like whats happening between sushim-bindusara in ashoka now!
and something which SHOULD BE EXPLORED between Mannu and Jagya, there is so much complication in their relationship..it would work very very well..Mannu's insecurities, vulnerabilities, coupled with J's immaturity and impulsiveness and tendencies to make mistakes in decisions..resulting into a perfect setup of imbalance in father-son relationship
as for J-A..they were, are, will always be friends..so it will be nice to see some conversations, some really nice one to ones..I remember there was one between Jaan when Shiv was alive..and Jaan chatted up over tea or something..that was a nice one..