Nothing is certain yet but as I said elsewhere, on ITT he was enthused about his Tango but was not too fussed abot the Jive. Jay seemed to imply that the Jive was a performance but the Tango was a dance (beautiful grl in hold, leading her round the dance floor etc)
If Aliona wants to really push for the win she may persuade him that the Jive is the biggest crowd pleaser. Then again is winning "The Glitterball" likely to be a life changing or career changing moment for either of them? After the final they both go back to their previous lives so shouldn't they just go for the thing that gives them the most pleasure? While the Jive may please millions at home, I'm sure it can't compare to holding Aliona in your arms one last time.