Nintendo to me has the most avenues to winning E3 due to their wide game potential we can safely assume is there (Like Oddysey and Fire Emblem Warriors), though I will admit Sony could beat them if they have a really good presentation or Nintendo doesn't have any major surprises in or outside what they announced.
The Democratic Nintendo fan....is that a paradox? I'm fond of one of the more conservative companies in the industry, but I vote Liberally and view myself that way 90% of the time?