Joker is a beast now after the patch!! I was so excited to play as him when he was announced but gave up on him because I couldn't really get any big combos going and his MB gas canister didn't really link to anything, but now that his gas canister MB has been buffed, I can do the combo below and many many other new combos

3,2 (this is a 2 button combo but does 3 hits, wait for the third hit) then gas canister MB, b+3, jump-in 3, then 1,1,crowbar beat down MB = 15 hits, 42% damage! (2 bars meter) I think im going to be using Joker a lot more now...

its funny that NRS kinda screwed up the Joker patch (the patch doesnt affect his red hood alternate costume, kinda like what happened in MK9 with cyrax and his human alt) using that costume and doing the combo above, the 3,2,gas canister MB doesnt connect as a full combo, so happy they buffed Joker, hes very useable now!