Like I've said before, a redesign might be likely, but I'm also not betting on it. Not because it isn't due, not because it isn't time. Rather, because Apple has phoned it in across the board for years now.
What has Apple given us, design-wise, over the past five years that's been revolutionary? The retina MacBook is alright, but far from revolutionary, and also not the thinnest, lightest Core M notebook out there. It's also essentially just the Air's design, stripped down even further.
The iPad Pro models are essentially more of the same. We've got another version of the iPhone 5 in the SE, and essentially a 6SS coming this fall. Even the Applr watch is lacking in design and refinement, and it was a headlining device for Apple.
For me, it's all well and good to expect a redesign for the MBP line, but reflecting on Apple's recent lack of advancement, I'm not going to be shocked if there's just an update to skylake with the current design left as is.