There's really no way to guess the ballot as of right now. So far, every exit poll has shown K Rool being far and above more popular than Dixie. For those who voted in the ballot but aren't posting on this exit polls, we can't gauge who they're voting for because they can vote for literally anyone, as the ballot states. I'd reckon 3rd parties are topping the vote. Plus, these "insular communities" are the ones who actually care to rally behind a character and campaign for him/her. For all we know, everyone else who doesn't lurk the various boards could be posting for 100s of different characters individually. K Rool just has a campaign going for him, much more so than Dixie Kong. Isaac, Inkling, Wonder Red, Bayonetta, and plenty others have campaigns going too.
Sadly, every character is still going to be considered at most, just because a character wins the ballot doesn't mean they'll be in Smash, like if Goku or Shrek win. We can really only speculate, campaign, and argue until we know the results. If we ever know the results.