Looking ahead at the dances remaining is actually quite eye-opening.
I think Louis has by far the best run of remaining dances, probably he will peak at the right time. He's got: Argentine Tango, Charleston, Jive, Paso, Rumba, Quickstep and VW. None of those I particularly see any problems with technically, but performance may be a factor for some.
Denise has got a tough run when you consider that it includes Samba, Salsa and Rumba (though I think James will ditch the samba). The only other hip action based Latin that she's done is the cha cha - by far her worst dance. Her Argentine Tango, American Smooth, Quickstep and Tango should be fine though.
Lisa has a nightmare run to the final, if she makes it: Argentine Tango, Salsa, American Smooth, Paso, Rumba, Quickstep and Waltz.

She may be able to coast for the waltz and salsa, but the others are not gonna suit her at all.
Michael is also gonna run into several dances that won't suit: Argentine Tango, Charleston, Samba, Paso and Rumba. His Viennese Waltz and Tango should be ok though.
Kimberley has a mixed bag. American Smooth, Waltz and Tango should be alright for her; Rumba, Jive, Charleston and Argentine Tango less so I would say.
Dani, like Louis, has a great run of dances: Argentine Tango, Charleston, American Smooth, Samba, and Viennese Waltz. The only two that might trouble her are the Paso and the Rumba in my opinion.
Nicky could be able to make the Charleston, American Smooth and Viennese Waltz work for him. But I'm not looking forward to the Argentine Tango, Salsa, Samba and Paso.
Victoria probably won't last much longer, but if she does she'll have some disaster dances - the Argentine Tango, Charleston, Salsa, American Smooth and the Jive.

Her Viennese Waltz and Waltz should be ok though.