What's left and what's disco
I have no idea what's left to be the next style trend, the only bike I "designed" is just a makeover of a vintage Honda anyway and most people don't like it. "Disco" was a term applied not long after the sport bike styling became ubiquitous, in part because during the disco era everybody dressed pretty much the same when going to the club.
Some of the modern naked bikes are okay, most of my gripe is the ridiculous amount of/style of the bodywork on most sport bikes. My primary dislike of the CB1000R - and trust me, I'm a Honda guy, all but 2 of the 36 bikes I've owned since age 14 have been Hondas - is the jacked up rear end for seemingly no reason. Single shock suspension is great but that much wheel clearance belongs on (and is only necessary for) a motocross bike IMHO. The horsepower and design are fabulous today although I'm not fond of all the electronics but cars are the same unfortunately. Oh, and the price too... I'm an old broke-dick and would love to own a modern fuel injected electronic ignition bike but I couldn't afford one even if there was one I actually wanted.
BUT, I know nothing is going to change just based on my opinion and/or interest.